Optical apparatus using polarized light

Details Optical apparatus using polarized light Optical apparatus using polarized light

1984-01-27

1987-01-06

Corbin, John K.

350524, 350527, 350429, G02B 711, G02B 2728

Patent

active

046342400

ABSTRACT:
An optical apparatus includes an illumination system for illuminating an object with a polarized beam in the desired state of polarization and an imaging system having a polarizing plate adapted to select a desired state of polarization of the beam and a variable magnification zoom erector, the state of polarization of the beam in the illuminating or imaging system being variable in accordance with the change of image magnification in the zoom erector, whereby the quantity of light for observation can effectively be controlled in accordance with the variations of image magnification in the imaging system.

REFERENCES:
patent: 2936673 (1960-05-01), Hyde et al.
patent: 3060808 (1962-10-01), Koester
patent: 3094581 (1963-06-01), Back
patent: 3972056 (1976-07-01), Tsujimoto et al.
patent: 4119364 (1978-10-01), Takahashi
patent: 4161756 (1979-07-01), Thomas
patent: 4251129 (1981-02-01), Suzki et al.
patent: 4466703 (1984-08-01), Nishimoto

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