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Ratio-Light Meter for Holography
- Leonardo
- The MIT Press
- Volume 22, Number 3-4, Summer/Autumn 1989
- pp. 415-416
- Article
- Additional Information
The author has developed a device that, once placed in the field of the film plane, will be able to compute the ratio of reference beam to object beam intensity and measure the power of the beams in mW. Energy readings in J/cm2 can be found by use of a constant. The author is at present programming a microprocessor that will extend the range of (1) the ratio readings, (2) the reference beam and object beam readings in mW, and (3) the reference beam readings in J/cm2. The device will be switchable for film type and will compute exposure and hold; moreover, a timing device will operate the shutter after the removal of the ratio diode head from the film plane.