Color separating device and color image reading device incorpora

Details Color separating device and color image reading device incorpora Color separating device and color image reading device incorpora

1995-02-21

1998-02-03

Nelms, David C.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359637, 359638, G02B 2714

Patent

active

057150958

ABSTRACT:
In a color separating device, three reflection elements each formed by laminating a dichroic mirror and a total reflection mirror via a transparent layer interposed therebetween are used. The three reflection elements have mutually different spectral characteristics and are arranged to separate incident light reflected from a color original into three color lights without causing a difference in optical paths of the respective color lights. Two of the reflection elements may be used in combination with a condenser lens having principal points whose positions differ depending on wavelengths of light, so as to perform the three-color separation in a similar manner.

REFERENCES:
patent: 4709144 (1987-11-01), Vincent
patent: 4962997 (1990-10-01), Baldwin
patent: 5032004 (1991-07-01), Steinle
patent: 5241407 (1993-08-01), Sonehara

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