Recording of time and other data on film in high speed instrumentation cameras
Abstract
The use of light emitting diode arrays and alpha-numeric characters allows highly sophisticated data recording on film in high speed instrumentation cameras. The systems described record BCD or numeric data on each frame simultaneously with the picture exposure. The same data in pulse code or serial form may be also recorded on moving tape, paper or on the film edge. Methods are presented for the generation, handling and multiplexing of the data and for decoding these signals to drive the light emitting diodes in the BCD arrays and/or the numeric characters in the camera recording heads. Compact 'on camera' packages are described in which a single transmission line delivers complete information required to record 10 or more digits at frame rates to 1000 frames per second.
- Publication:
-
High Speed Photography
- Pub Date:
- 1975
- Bibcode:
- 1975hsp..proc..319D
- Keywords:
-
- Data Recording;
- High Speed Cameras;
- Photographic Film;
- Photographic Recording;
- Time Measurement;
- Alphanumeric Characters;
- Data Management;
- Decoding;
- Frame Photography;
- Light Emitting Diodes;
- Matrices (Circuits);
- Multiplexing;
- Instrumentation and Photography