Beam splitter for color imaging equipment

Details Beam splitter for color imaging equipment Beam splitter for color imaging equipment

1987-09-16

1988-11-15

Corbin, John K.

350173, G02B 718, G02B 2714

Patent

active

047844698

ABSTRACT:
A beam splitter of a color imaging equipment includes three prism blocks for red, green and blue channels, connecting members for connecting the red channel prism block and the blue channel prism block via an air-gap, and supporting plates for supporting these prism blocks. The connecting members have the same or smaller expansion coefficient as the prism blocks. The supporting plates are connected to the green channel prism block, and substantially not connected to the red and blue channel prism blocks and the connecting members. Consequently, the air-gap between the red and blue channel prism blocks are not affected by the expansion/shrinkage of the supporting plates, and thereby the registration characteristic is improved.

REFERENCES:
patent: 4084180 (1978-04-01), Stoffels et al.

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