Patent
1987-12-01
1989-06-27
Henry, Jon W.
350321, 350252, G02B 702, G02B 718
Patent
active
048423971
ABSTRACT:
The invention relates to an apparatus or adjusting mechanism for adjusting optical elements with two degrees of freedom.
The essential feature of the adjusting mechanism proposed by the invention is its being built up of a tilting mechanism provided with a knuckle-joint system arranged between the stand and supporting platform of said tilting mechanism and connected in series with them to form a kinematic chain, further, comprising a deformation frame provided with a second knuckle-joint system, a coarse, quick-setting mechanism arranged between said supporting platform and deformation frame, and a fine setting mechanism located between said tilting mechanism and said stand.
The advantages of the adjusting mechanism complying with the invention is the possibility of performing quickly--within a wide range and with a very high, interferometric moving and aligning precision--the adjustment of optical elements into the desired angular position, entirely slipfree, providing thus a setting accuracy commensurate with the wavelengths of light.
In the course of adjustment the axes of rotation pass through the center of the optical element, therefore only the angular position of the latter changes, and the degrees of freedom are independent, so that the setting can be carried out conveniently, quickly and in an invariant way. The mechanical setup and production of the adjusting mechanism are simple, requiring no special technology.
The adjusting mechanism may be applied with the advantage to measurements, occurring mainly in the field of laser applications, where wide setting ranges and high setting resolutions are required.
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A. Frosch et al., "Positioning Device for Optical Components", IBM Tech. Dis. Bull., vol. 18, No. 10, Mar. 1976, p. 3333.
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J. Killpatrick et al., "Alignment Characteristics . . . ", Proc. of the IRE, Jun. 1962, p. 1521.
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