{"id":1892,"date":"2020-03-16T23:56:38","date_gmt":"2020-03-17T03:56:38","guid":{"rendered":"http:\/\/www.nuclearphysicslab.com\/npl\/?page_id=1892"},"modified":"2020-04-05T12:41:27","modified_gmt":"2020-04-05T16:41:27","slug":"rotating-drum-camera-1","status":"publish","type":"page","link":"http:\/\/www.nuclearphysicslab.com\/npl\/npl-home\/experiments\/photography\/rotating-drum-camera-1\/","title":{"rendered":"Rotating Drum Camera"},"content":{"rendered":"\n<p class=\"has-text-align-center\"><em>Author: Tim<\/em><\/p>\n\n\n\n<p>For my other UMD research, high-speed imaging is necessary, so I set out to find an inexpensive and robust high speed imaging method.  Current state of the art systems are many hundreds of thousands of dollars and were simply out of reach.  However, after several years, a few eBay finds and some repair, I was able to get an old Cordin Model 350 Rotating Drum Camera up and running.  The folks at Cordin have been super kind and generous with what little information they have left.  Prof. Andrew David-Hazy of RIT has also been super supportive and helpful as he has an similar but older Dynafax camera.<\/p>\n\n\n\n<p>It was explained to me that the last person in the world that knew how to load one of the film cassettes had died a few years back.  So, my bold assertion is that I am the only human left that knows how to load one of these up.  Since this technology is all but lost I have made a recording of loading and unloading film into the Model 350. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3590.jpg\"><img loading=\"lazy\" width=\"3264\" height=\"2448\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3590.jpg\" alt=\"\" class=\"wp-image-1893\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3590.jpg 3264w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3590-768x576.jpg 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3590-1536x1152.jpg 1536w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3590-2048x1536.jpg 2048w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3590-360x270.jpg 360w\" sizes=\"(max-width: 3264px) 100vw, 3264px\" \/><\/a><figcaption>The Cordin Model 447A controller, with an oscilloscope on top to monitor frame rate, and the Cordin Model 350 rotating drum camera.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-embed-vimeo wp-block-embed is-type-video is-provider-vimeo wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"IMG_3589.MOV\" src=\"https:\/\/player.vimeo.com\/video\/400127363?dnt=1&amp;app_id=122963\" width=\"640\" height=\"360\" frameborder=\"0\" allow=\"autoplay; fullscreen\" allowfullscreen><\/iframe>\n<\/div><figcaption>This is a video of the Cordin 350 spinning up, testing the new camera-controller cable harness I built. <\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.23.50-AM.png\"><img loading=\"lazy\" width=\"1638\" height=\"1208\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.23.50-AM.png\" alt=\"\" class=\"wp-image-1955\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.23.50-AM.png 1638w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.23.50-AM-768x566.png 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.23.50-AM-1536x1133.png 1536w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.23.50-AM-366x270.png 366w\" sizes=\"(max-width: 1638px) 100vw, 1638px\" \/><\/a><figcaption>From the instruction manual: labeling of major components<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.52-AM.png\"><img loading=\"lazy\" width=\"1186\" height=\"1584\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.52-AM.png\" alt=\"\" class=\"wp-image-1956\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.52-AM.png 1186w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.52-AM-768x1026.png 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.52-AM-1150x1536.png 1150w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.52-AM-202x270.png 202w\" sizes=\"(max-width: 1186px) 100vw, 1186px\" \/><\/a><figcaption>From the instruction manual: the optical path.  Note items 5, 10 and 10&#8242; &#8211; these are crucial &#8220;stops&#8221; that were missing from this camera.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3577.jpg\"><img loading=\"lazy\" width=\"3264\" height=\"2448\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3577.jpg\" alt=\"\" class=\"wp-image-1928\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3577.jpg 3264w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3577-768x576.jpg 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3577-1536x1152.jpg 1536w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3577-2048x1536.jpg 2048w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3577-360x270.jpg 360w\" sizes=\"(max-width: 3264px) 100vw, 3264px\" \/><\/a><figcaption>Inside the Model 350<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.08-AM.png\"><img loading=\"lazy\" width=\"1772\" height=\"1498\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.08-AM.png\" alt=\"\" class=\"wp-image-1952\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.08-AM.png 1772w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.08-AM-768x649.png 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.08-AM-1536x1298.png 1536w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.08-AM-319x270.png 319w\" sizes=\"(max-width: 1772px) 100vw, 1772px\" \/><\/a><figcaption>From the instruction manual: labeling of internal components<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3579.jpg\"><img loading=\"lazy\" width=\"3264\" height=\"2448\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3579.jpg\" alt=\"\" class=\"wp-image-1930\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3579.jpg 3264w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3579-768x576.jpg 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3579-1536x1152.jpg 1536w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3579-2048x1536.jpg 2048w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3579-360x270.jpg 360w\" sizes=\"(max-width: 3264px) 100vw, 3264px\" \/><\/a><figcaption>Again, note the missing exit stop that would mount in the two slots.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3580.jpg\"><img loading=\"lazy\" width=\"2448\" height=\"3264\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3580.jpg\" alt=\"\" class=\"wp-image-1931\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3580.jpg 2448w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3580-1875x2500.jpg 1875w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3580-768x1024.jpg 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3580-1152x1536.jpg 1152w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3580-1536x2048.jpg 1536w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3580-203x270.jpg 203w\" sizes=\"(max-width: 2448px) 100vw, 2448px\" \/><\/a><figcaption>Also note missing entrance stop which would have been mounted under the entrance relay mirror<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1945.jpg\"><img loading=\"lazy\" width=\"4032\" height=\"3024\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1945.jpg\" alt=\"\" class=\"wp-image-1932\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1945.jpg 4032w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1945-768x576.jpg 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1945-1536x1152.jpg 1536w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1945-2048x1536.jpg 2048w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1945-360x270.jpg 360w\" sizes=\"(max-width: 4032px) 100vw, 4032px\" \/><\/a><figcaption>The Model 350 project was on hold until this Beckman &amp; Whitley Dynafax camera came along on eBay.  Since its construction is nearly identical, it was hoped that its stops could be scavenged. It indeed had the stops, but the mounting was total different.  At least some dimension now became available, such as the thickness and diamond apertures of the stops.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1969-rotated.jpg\"><img loading=\"lazy\" width=\"3024\" height=\"4032\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1969-rotated.jpg\" alt=\"\" class=\"wp-image-1933\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1969-rotated.jpg 3024w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1969-1875x2500.jpg 1875w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1969-768x1024.jpg 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1969-1152x1536.jpg 1152w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1969-1536x2048.jpg 1536w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1969-203x270.jpg 203w\" sizes=\"(max-width: 3024px) 100vw, 3024px\" \/><\/a><figcaption>This is the capping stop from the Dynafax.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1972-rotated.jpg\"><img loading=\"lazy\" width=\"3024\" height=\"4032\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1972-rotated.jpg\" alt=\"\" class=\"wp-image-1934\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1972-rotated.jpg 3024w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1972-1875x2500.jpg 1875w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1972-768x1024.jpg 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1972-1152x1536.jpg 1152w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1972-1536x2048.jpg 1536w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_1972-203x270.jpg 203w\" sizes=\"(max-width: 3024px) 100vw, 3024px\" \/><\/a><figcaption>It was about 0.010inches thick.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3056-rotated.jpg\"><img loading=\"lazy\" width=\"3024\" height=\"4032\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3056-rotated.jpg\" alt=\"\" class=\"wp-image-1935\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3056-rotated.jpg 3024w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3056-1875x2500.jpg 1875w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3056-768x1024.jpg 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3056-1152x1536.jpg 1152w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3056-1536x2048.jpg 1536w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3056-203x270.jpg 203w\" sizes=\"(max-width: 3024px) 100vw, 3024px\" \/><\/a><figcaption>After careful reverse engineering, the machine shop was then able to replicate the stops with appropriate mounting for the Model 350.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3052-rotated.jpg\"><img loading=\"lazy\" width=\"3024\" height=\"4032\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3052-rotated.jpg\" alt=\"\" class=\"wp-image-1936\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3052-rotated.jpg 3024w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3052-1875x2500.jpg 1875w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3052-768x1024.jpg 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3052-1152x1536.jpg 1152w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3052-1536x2048.jpg 1536w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3052-203x270.jpg 203w\" sizes=\"(max-width: 3024px) 100vw, 3024px\" \/><\/a><figcaption>This was a precision job that worked the first time.  Note the exit stops sitting upside down just to test their mating to the Model 350&#8217;s alignment pins.  <\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.22-AM.png\"><img loading=\"lazy\" width=\"1908\" height=\"1330\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.22-AM.png\" alt=\"\" class=\"wp-image-1953\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.22-AM.png 1908w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.22-AM-768x535.png 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.22-AM-1536x1071.png 1536w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.22.22-AM-387x270.png 387w\" sizes=\"(max-width: 1908px) 100vw, 1908px\" \/><\/a><figcaption>From the instruction manual: labeling of the film cassette and its mounting bezel.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.23.06-AM.png\"><img loading=\"lazy\" width=\"1206\" height=\"902\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.23.06-AM.png\" alt=\"\" class=\"wp-image-1954\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.23.06-AM.png 1206w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.23.06-AM-768x574.png 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.23.06-AM-361x270.png 361w\" sizes=\"(max-width: 1206px) 100vw, 1206px\" \/><\/a><figcaption>From the instruction manual: The film partially loaded into the cassette<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-embed-vimeo wp-block-embed is-type-video is-provider-vimeo wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Cordin_350_Film.mp4\" src=\"https:\/\/player.vimeo.com\/video\/403481598?dnt=1&amp;app_id=122963\" width=\"640\" height=\"360\" frameborder=\"0\" allow=\"autoplay; fullscreen\" allowfullscreen><\/iframe>\n<\/div><figcaption>Here is a short video I made on loading the Cordin 350 film cassette, then loading the camera drum with the film, then retrieving the film from the camera.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.24.25-AM.png\"><img loading=\"lazy\" width=\"962\" height=\"1148\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.24.25-AM.png\" alt=\"\" class=\"wp-image-1957\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.24.25-AM.png 962w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.24.25-AM-768x916.png 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.24.25-AM-226x270.png 226w\" sizes=\"(max-width: 962px) 100vw, 962px\" \/><\/a><figcaption>From the instruction manual: while the camera uses 35 mm film, it does not put down a full frame that normal 35 mm users would expect, rather in one 34-inch long loading, the camera makes 224 small circular exposures, two rows of 112 images.  Because of the angular separation between the upper and lower optical paths, the upper and lower sequence of images are offset by 7 images.  <\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3132-rotated.jpg\"><img loading=\"lazy\" width=\"3024\" height=\"4032\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3132-rotated.jpg\" alt=\"\" class=\"wp-image-1938\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3132-rotated.jpg 3024w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3132-1875x2500.jpg 1875w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3132-768x1024.jpg 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3132-1152x1536.jpg 1152w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3132-1536x2048.jpg 1536w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3132-203x270.jpg 203w\" sizes=\"(max-width: 3024px) 100vw, 3024px\" \/><\/a><figcaption>It was time for a test with the newly installed entrance and exit slits.  Tim&#8217;s old soviet stopwatch was used as a test subject. <\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3088-1.jpg\"><img loading=\"lazy\" width=\"3024\" height=\"4032\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3088-1.jpg\" alt=\"\" class=\"wp-image-1937\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3088-1.jpg 3024w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3088-1-1875x2500.jpg 1875w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3088-1-768x1024.jpg 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3088-1-1152x1536.jpg 1152w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3088-1-1536x2048.jpg 1536w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3088-1-203x270.jpg 203w\" sizes=\"(max-width: 3024px) 100vw, 3024px\" \/><\/a><figcaption>It works!  A but underexposed, but none-the less, a sequence of in-focus  images of the stop watch forms.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3113.jpg\"><img loading=\"lazy\" width=\"3024\" height=\"4032\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3113.jpg\" alt=\"\" class=\"wp-image-1939\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3113.jpg 3024w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3113-1875x2500.jpg 1875w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3113-768x1024.jpg 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3113-1152x1536.jpg 1152w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3113-1536x2048.jpg 1536w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/IMG_3113-203x270.jpg 203w\" sizes=\"(max-width: 3024px) 100vw, 3024px\" \/><\/a><figcaption>Using the Bessler enlarge, a few of the small frames were projected and captured with a cell phone camera.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.24.49-AM.png\"><img loading=\"lazy\" width=\"1012\" height=\"1360\" src=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.24.49-AM.png\" alt=\"\" class=\"wp-image-1958\" srcset=\"http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.24.49-AM.png 1012w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.24.49-AM-768x1032.png 768w, http:\/\/www.nuclearphysicslab.com\/npl\/wp-content\/uploads\/Screen-Shot-2020-03-17-at-8.24.49-AM-201x270.png 201w\" sizes=\"(max-width: 1012px) 100vw, 1012px\" \/><\/a><figcaption>From the instruction manual: a useful guide to determining exposure rate for the Model 350.<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Author: Tim For my other UMD research, high-speed imaging is necessary, so I set out to find an inexpensive and robust high speed imaging method. Current state of the art systems are many hundreds of thousands of dollars and were simply out of reach. However, after several years, a few eBay finds and some&#8230;<\/p>\n<p class=\"read-more\"><a class=\"btn btn-default\" href=\"http:\/\/www.nuclearphysicslab.com\/npl\/npl-home\/experiments\/photography\/rotating-drum-camera-1\/\"> Read More<span class=\"screen-reader-text\">  Read More<\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":1893,"parent":1856,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":{"advanced-sidebar-menu\/link-title":"","advanced-sidebar-menu\/exclude-page":false},"categories":[18,68,75,37],"tags":[],"_links":{"self":[{"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/pages\/1892"}],"collection":[{"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/comments?post=1892"}],"version-history":[{"count":8,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/pages\/1892\/revisions"}],"predecessor-version":[{"id":2951,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/pages\/1892\/revisions\/2951"}],"up":[{"embeddable":true,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/pages\/1856"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/media\/1893"}],"wp:attachment":[{"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/media?parent=1892"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/categories?post=1892"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.nuclearphysicslab.com\/npl\/wp-json\/wp\/v2\/tags?post=1892"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}