Abstract The beam splitter comprises first and second prisms having diagonal surfaces placed together in juxtaposed relationship with means on the opposing edge portions of the surfaces holding the surfaces in spaced relationship to define a thin chamber therebetween. A fluorinated hydro-carbon liquid fills this chamber and one diagonal surface is provided with a multi-layered di-electric coating. High reflectance is provided for the S component of a laser beam and high transmittance for the P component for both ruby and neodymium laser wave lengths of 0.694 and 1.06 microns respectively. The use of the liquid interface avoids the necessity of cement or glue to hold the prisms together so that the beam splitter may be used with high power laser beams without the risk of deterioration.
Inventors
👤 Samuel J Holmes
👤 Frank Joseph Woodberry
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-28 01:12
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/28; G02B27/283
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
45 words
A beam splitter according to claim 1, in which said means on the opposing edge portions comprises a thin strip of material cemented to the eDge portions, the thickness of said strip being from 0.1 to 0.3 mils and defining the thickness of said chamber.
Claim 2
Dependent Claim
41 words
A beam splitter according to claim 1, in which said prisms are right angled such that placing of the diagonal surfaces in juxtaposed relationship generally defines a cube, the laser beam entrance and exit surfaces of said cube having anti-reflection coatings.
Claim 3
Dependent Claim
45 words
A beam splitter according to claim 1, in which the thicknesses of the multi-layers making up said dielectric coating are such that said high reflectance and high transmittance properties are greater than 99 percent for laser wave lengths of from 0.690 microns to 1.060 microns.