Browse Prior Art Database

Lens Alignment

IP.com Disclosure Number: IPCOM000088665D
Original Publication Date: 1977-Jul-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 72K

Publishing Venue

IBM

Related People

Buddington, DL: AUTHOR [+3]

Abstract

A lens can be accurately squared within its lens barrel by accurately machining the end of the tubular lens barrel to thereby define a planar surface normal to the barrel's axis, placing a mirror thereon, and reflecting a collimated light source back onto itself. Lens magnification relative to a fixed object and image plane can be set by drilling a locating hole into the lens barrel at a prescribed distance from the object plane.

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Lens Alignment

A lens can be accurately squared within its lens barrel by accurately machining the end of the tubular lens barrel to thereby define a planar surface normal to the barrel's axis, placing a mirror thereon, and reflecting a collimated light source back onto itself. Lens magnification relative to a fixed object and image plane can be set by drilling a locating hole into the lens barrel at a prescribed distance from the object plane.

As shown, the lens 21, lens sleeve 10 and the carrier 11 are placed on rails 12 and 13. Squaring mirror 14 is placed on the top of the lens barrel, this barrel having been accurately machined to insure that its end defines a plane normal to the axis of the barrel.

Laser 15 is energized and meters 16 are used to read reflected energy. These meters read zero when the axis of the lens barrel is parallel to the laser beam, and sleeve 10 is adjusted to produce this reading.

Lens 21 is now adjusted vertically into the lens sleeve. Fixture 17 is raised until the lens can he secured to the lens sleeve by alignment of the locating hole (not shown) of the lens with a pin carried by the lens fixture.

The lens and its fixture may now be removed and placed on a like set of rails 12 and 13 carried by the optical equipment with which the lens is to be used. In this equipment, the lens is driven along the rails by a cam (not shown) which engages roller 18. The position of this roller is accurately adjusted while in the fixture by moving t...