THE DESIGN AND FABRICATION OF TWO KINDS OF TRANSMISSION DIFFRACTIVE OPTICS IS PROPOSED.

THE DESIGN AND FABRICATION OF TWO KINDS OF TRANSMISSION DIFFRACTIVE OPTICS IS PROPOSED. THE OPTICS ARE TO REPLACE BULKIER AND HEAVIER REFRACTIVE OPTICS. THE USE OF A CONVENTIONAL LENS DESIGN PROGRAM IS SUGGESTED WITH MODIFICATIONS MADE BY THE INVESTIGATOR. A SIMPLE PROGRAM BY DON SMALL OPTICS IS ADAPTED FOR DIFFRACTION USE ON A PC. TWO SYSTEMS USING ON AXIS TECHNIQUES BY BACK TO BACK CONJUGATE HOLOGRAMS WITH AND WITHOUT 3M LIGHT CONTROL FILM ARE PROPOSED. A NOVEL MASTER COPY PROCESS WHERE THE ORIGINAL MASTER IS MADE AT 545 NM IN SILVER GRAIN FILM IS PREFERRED. SUBSEQUENT PROCESSING YIELDS ON SHG MASTER SUITABLE FOR BLUE COPY WAVELENGTHS. WELL WORKED OUT COPY SCHEMES INTO DCG PRODUCE CORRECT BRAGG TILT AND HIGH EFFICIENCY COPIES. THE PRINCIPAL WORKERS HAVE PRODUCED MANY THOUSANDS OF HOES USING SIMILAR PROCESSES OVER A 10 YEAR PERIOD. METHODS FOR ELIMINATING ALL TYPES OF ABERRATION ARE IDENTIFIED, FOR ON AXIS OPERATION. TWO MEDIUMS ARE PROPOSED AND EQUALLY GOOD CHOICES. DCG FOR PRIMARY WORK AND PVK FOR POSSIBLE SPECIAL ENVIRONMENTS.