PRODUCTION ENGINEERING MEASURE FOR RUBY LASER RODS.

The document reports progress toward improving the ruby crystal growth process for the manufacture of Rangefinder laser rods. Engineering studies during the quarter were concentrated on the effects on individual variables. Definite relations between boule quality and standoff, boule diameter and gas ratios have emerged. Necessity for extended growth runs and repetition of many tests has caused the growth study to slip one and one-half months behind schedule but current use of shorter growth runs and introduction of an improved feeder six months ahead of schedule will compensate for this slippage. Improved control of the distance between burner and boule cap by an automatic photosensitive device has been extended to both growth stations allocated for contract work. A continuous powder feed has been installed on one station and has operated satisfactorily. Evaluation of boules has been based primarily upon fringe pattern and passive beam divergence. Equipment for active laser testing is not yet available and is cause for a delay in shipment of Engineering Test Samples. Author