Color encoding filter and method for making the same

Details Color encoding filter and method for making the same Color encoding filter and method for making the same

1975-05-15

1977-06-14

Stern, Ronald J.

Electric lamp and discharge devices

With temperature modifier

For lead-in-seal or stem protection

313371, 350317, G02B 528, H01J 2902

Patent

active

040293947

ABSTRACT:
A color encoding or dichroic filter for video transmission and method of making the same is provided. The color encoding filter can be used with a vidicon tube to provide color signals for video transmission. The filter comprises a substantially transparent substrate, such as glass, having a plurality of grid patterns superimposed thereon with each pattern individually or in conjunction with an overlapping grid pattern capable of transmitting a predetermined bandwidth of energy. A substantially transparent filler material is utilized to complete the filter structure. The filler material is substantially transparent to the desired transmitted bandwidth of energy and is further optically complementary to the filter material of each individual grid pattern to minimize any refractive scattering of transmitted energy. The filler material also provides both a planar exterior surface to the filter and further permits the filter material of the overlapping grid patterns to be maintained with a constant thickness.

REFERENCES:
patent: 3912962 (1975-10-01), Nobutoki

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