IR laser line-of-sight alignment

Optics: measuring and testing – Angle measuring or angular axial alignment – Alignment of axes nominally coaxial

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Details

3561523, 33348, G01B 1126, G01C 100

Patent

active

056297670

ABSTRACT:
A method of visually aligning an optical instrument (10, 26, 28) that simultaneously operates at two different wavelengths where the first wavelength is in the visible photopic electromagnetic spectral region and the second wavelength is outside the visible photopic electromagnetic spectral region. The method for visually aligning the optical instrument (10, 26, 28) includes employing an aiming reticle (12) located at the eyepiece (18) of the optical instrument (10, 26, 28), this first reticle (12) having a reticle pattern (64) which is in focus when viewed through the eyepiece (18), and a plate (44) with a second reticle pattern (62) on one side. The second reticle pattern (62) is positioned in the optical system such that when this second reticle pattern (62) is illuminated (58) with light of the first wavelength, then this second reticle pattern (62) will be in focus and superimposed on the first reticle pattern (64) when viewed through the eyepiece (18). Alignment can then be accomplished by aligning the focused image (62') of the second reticle pattern (62) onto the first reticle pattern (64) displayed at the eyepiece (18). The method for visual alignment allows the operator to use his/her eyes to align a coaxial optical instrument (10, 26, 28), such as visual telescope (10) and an infrared laser (26, 28) which operates outsides the visible spectrum.

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patent: 4422758 (1983-12-01), Godfrey
patent: 4763419 (1988-08-01), Whitman, III
patent: 4908948 (1990-03-01), Gormley
patent: 5009502 (1991-04-01), Shih
patent: 5151753 (1992-09-01), Whitman, III

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