The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 1978
Filed:
Jul. 26, 1976
Samuel M Stone, Lynnfield, MA (US);
GTE Laboratories Incorporated, Waltham, MA (US);
Abstract
A laser beam intensity regulator is disclosed for independently regulating the relative intensities of the coaxial monochromatic beams eminating from a multi-wavelength laser. First, the monochromatic beams are spatially separated. Utilizing the shift of a dielectric mirror's pass band towards lower wavelengths as the angle of incident beam thereon increases, the regulator described herein includes a rotatable dielectric mirror placed in the path of the monochromatic beam to be regulated. The wavelength of the beam lies on the edge of the mirror's pass band so that the amount of light transmitted through the mirror changes as a function of the angle of incidence. The mirror is controllably rotated in response to the difference between the actual and desired beam intensities to maintain the beam at the desired intensity.