Optical system for variable inclination angle microscope tubes

Details Optical system for variable inclination angle microscope tubes Optical system for variable inclination angle microscope tubes

1985-06-27

1987-02-17

Henry, Jon W.

350145, 350502, 350516, 350539, G02B 2120, G02B 2710, G02B 718

Patent

active

046435417

ABSTRACT:
An optical system for variable inclination angle microscope tubes, in order to shorten properly the distance between the position of the eye point and focusing handle thereby to improve the operability, comprising a first optical element for bending at right angles the light path of the incident light, a second optical element for bending twice at right angles the light path of the incident light from the first optical element, a third optical element for bending twice at right angles the light path of the incident light from the second optical element and a fourth optical element arranged to bend at right angles the light path of the incident light from the third optical element and then direct it in the same direction as of the incident light upon the first optical element, the third optical element being mounted rotatably around the optical axis of the incident light upon it and the fourth optical element being so mounted as to be able to rotate by an angle twice as large as the angle of rotation of the third optical element interlocking with the rotation of the third optical element around the optical axis of the incident light upon it. Instead of the third and fourth optical elements may be arranged a prism for bending at the right angles the light path of the incident light from the second optical element and then directing it in the same direction as of the incident light upon said first optical element. In this case, the second optical element prism are rotated integrally around the optical axis of the incident light from the first optical element and the prism is further rotated by an angle twice as large as the angle of rotation of the second optical element around the optical axis of the incident light upon it.

REFERENCES:
patent: 4299439 (1981-11-01), Stromblad
patent: 4412727 (1983-11-01), Taira
Bruce H. Walker, "Pechan Devotation Prism . . . ", Opt. Eng., Nov.-Dec. 1974, vol. 13, No. 6, pp. G233-234.

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