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US3704934A Expired / Lapsed US ⏱️ 0.0 years remaining

Laser polarizing beam splitter

Assignee: Union Carbide Corp
•
Filing: 1971-08-16
•
Granted: 1972-12-05
•
Expires: 1991-08-16
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Abstract

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 —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 23:57
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.

References Cited (Backward Citations)

US3552823A Cited
US3487230A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-12-05 1976-06-05 1976-12-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-12-05 1980-06-05 1980-12-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-12-05 1984-06-05 1984-12-05 $7700.00 Window Closed / Lapsed

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