Characterization of CNRS Fizeau wedge laser tuner
A fringe detection and measurement system was constructed for use with the CNRS Fizeau wedge laser tuner, consisting of three circuit boards. The first board is a standard Reticon RC-100 B motherboard which is used to provide the timing, video processing, and housekeeping functions required by the Reticon RL-512 G photodiode array used in the system. The sampled and held video signal from the motherboard is processed by a second, custom-fabricated circuit board which contains a high-speed fringe detection and locating circuit. This board includes a dc level-discriminator-type fringe detector, a counter circuit to determine fringe center, a pulsed laser triggering circuit, and a control circuit to operate the shutter for the He-Ne reference laser beam. The fringe center information is supplied to the third board, a commercial single board computer, which governs the data-collection process and interprets the results.
- Research Organization:
- Maryland Univ., College Park (USA)
- OSTI ID:
- 5615873
- Report Number(s):
- N-85-18328; NASA-CR-174357
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420300* -- Engineering-- Lasers-- (-1989)
440300 -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
ELECTROMECHANICS
ELECTRONIC CIRCUITS
GAS LASERS
HELIUM-NEON LASERS
LASERS
MECHANICS
PHOTODIODES
PULSE CIRCUITS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
TRIGGER CIRCUITS
TUNING