Itek Corporation LUPI (Laser Unequal Path Interferometer) has revolutionized optical testing. It makes use of two beams of laser light to create an "interference pattern." Here it is being tested at a test tunnel in Lexington.

Digital Commonwealth — Boston Public Library

Itek Corporation LUPI (Laser Unequal Path Interferometer) has revolutionized optical testing. It makes use of two beams of laser light to create an "interference pattern." Here it is being tested at a test tunnel in Lexington.

[ca. January 1969]

RightsCC0 — Public Domain

CollectionDigital Commonwealth — Boston Public Library

[Information from item housing] Lasers

🔒

Order museum-quality prints

Sign in to order prints, canvas, and more of this work. Browsing and full-resolution downloads stay free.