Operation microscope with an interference filter, and interferen

Details Operation microscope with an interference filter, and interferen Operation microscope with an interference filter, and interferen

1998-08-14

2000-02-22

Spyrou, Cassandra

Optical: systems and elements

Light interference

Produced by coating or lamina

359359, 359577, 359580, 359581, 359586, 359588, G02B 528, G02B 110, G02B 2700, F21V 904

Patent

active

060287071

ABSTRACT:
An operation microscope includes an illuminating device and an interference filter in the illuminating beam of the illuminating device. The interference filter is suitable for incorporation into the operation microscope. In order to prevent the yellow tinge that is present in long-known UV interference filters, the interference layer applied directly to the carrier substrate is a layer between 8 and 12 nm thick of yttrium fluoride, thorium fluoride, lanthanum fluoride or cerium fluoride.

REFERENCES:
patent: 5923471 (1999-07-01), Wood, II et al.
Zycha, Harald. Refining Algorithm for the Design of Multilayer Filters. Applied Optics, vol. 12, No. 5, pP. 979-983, May 31, 1973.
Chemical Abstracts, vol. 111, No. 18, Oct. 30, 1989.

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