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Big OEM prism
Some of the big prisms used for special optical system, or used as a flatness standards. The special optical process in the prisms like holes, grooves, they all for assembly purpose.
PHYO can still provide shaped big prisms block for customer to polishing inhouse or doing some development work.

Spec Commercial High Precision
Material As required like H-K9L,BK7,FS As required like H-K9L,BK7,FS
Demension Tolerance +0.00/-0.20 +0.00/-0.10
90degree daviation tolerance 1-3arcmin 10/-10arcsec
45degree daviation tolerance 20/-20arcsec 3/-3arcsec
Flatness per 25mm@632.8nm L-L/2 L/4-L/8
Surface quality 80-50 40-20
Bevel 0.05-0.2 0.05-0.2
Coating AR, HR, Painting available AR, HR, Painting available
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