Flash duration
Also known as freezing motion, motion freezing. Category: Lighting and optics
Flash duration is the length of time a flash burst lasts. When the flash is the main light source, a very short duration, for example 1/10,000 s, effectively becomes the exposure time and freezes motion even if the subject is moving.
How PhotoRobot uses it
PhotoRobot relies on very short flashes of about 1/10,000 s to photograph products during continuous turntable rotation. The robot reads the table position 1000 times per second so the flash fires at precisely the right moment; PhotoRobot states this gives on average a four-fold productivity increase.
Related terms
- Strobe: A studio flash that emits a very short, powerful burst of light, freezing motion.
- Fast Spin: PhotoRobot capture mode that photographs during continuous turntable rotation instead of stopping at each angle.
- Shutter speed: How long the camera shutter stays open; with flash, the flash duration usually freezes the motion instead.
- Rotary encoder: A sensor that reports the exact angular position of a rotating part, such as a turntable plate.
Where this term appears on photorobot.com
Mentioned on 4 pages of photorobot.com:
- PhotoRobot Control Units - Technical Documentation (Page)
To freeze the motion, a flash from high-power photographic lights with a duration of 1/10,000 s is used – with the robot providing an adjustable advance notification when reaching the defined position. - Broncolor Siros 800 S WiFi / RFS 2 Operating Instructions (Manual)
…ISO) with reflector L40 32 8/10 Aperture at 2 m (100 ISO) with reflector P70 45 6/10 Flash duration t0.1 (t0.5) – Min. - Studio Lighting Overview for PhotoRobot Systems (Manual)
Instead, exposure is performed by a “freezing of motion” during a very short and intense flash. - Mastering Product Photography: Shoes and Footwear (Blog)
…shutters will open and in what order to capture photos in the illuminated during the flash duration.