accessory plate

accessory plate

[ak′ses·ə·rē ‚plāt]
(optics)
Thin plate of quartz, gypsum, or mica used with a petrological microscope to modify the effects of polarized light and intensify qualities in translucent minerals.
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References in periodicals archive ?
Weighing 4% pounds (2kg), the camera includes a 3-inch threaded accessory plate and is compatible with all current SBIG STXL accessories.
Some of the Gen.8 printable files include headlight adapters, skid plate lock nut block, electronics relocation brackets, accessory plates, alternate battery brackets, and fan mounts for those who want to upgrade their power system.
Accessory plates from Lenox are good, and Fitz & Floyd being in the accent plate business again has been good for us.