GB1468051A - Optical polarisers - Google Patents

Optical polarisers

Info

Publication number
GB1468051A
GB1468051A GB1591874A GB1591874A GB1468051A GB 1468051 A GB1468051 A GB 1468051A GB 1591874 A GB1591874 A GB 1591874A GB 1591874 A GB1591874 A GB 1591874A GB 1468051 A GB1468051 A GB 1468051A
Authority
GB
United Kingdom
Prior art keywords
ray
crystal
substance
pyrophanite
hetaerolite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1591874A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1591874A priority Critical patent/GB1468051A/en
Publication of GB1468051A publication Critical patent/GB1468051A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/02—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of crystals, e.g. rock-salt, semi-conductors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/08—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of polarising materials

Abstract

1468051 Polarization GENERAL ELECTRIC CO Ltd 21 March 1975 [10 April 1974] 15918/74 Heading G2J A Glan air-spaced polarizer, substantially of the form shown, comprises a crystal of a birefringent substance having a figure of merit defined by: |#n|N#| wherein N = No + Ne and #n = Ne-N0; No and Ne respectively being the R.I. of the substance, at any given wavelength, in respect of the ordinary ray and the extraordinary ray. The crystal may have a high birefringence such that the Brewster angle for the ray, O or E, having the greater R.I.is greater than or equal to the critical angle of the other ray. The crystal may be composed of one of these substances: Fe 2 O 3 , hematite; Mn 3 O 4 , hausmannite; ZnMn 2 O 4 , hetaerolite; MnTiO 3 pyrophanite; PbCrO 4 , crocoite; MgTiO 3 , geikielite, TiO 2 , rutile, or PbCO 3 , cerussite.
GB1591874A 1975-03-21 1975-03-21 Optical polarisers Expired GB1468051A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1591874A GB1468051A (en) 1975-03-21 1975-03-21 Optical polarisers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1591874A GB1468051A (en) 1975-03-21 1975-03-21 Optical polarisers

Publications (1)

Publication Number Publication Date
GB1468051A true GB1468051A (en) 1977-03-23

Family

ID=10067895

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1591874A Expired GB1468051A (en) 1975-03-21 1975-03-21 Optical polarisers

Country Status (1)

Country Link
GB (1) GB1468051A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504123A (en) * 1981-10-05 1985-03-12 Raytheon Company High efficiency polarizing beamsplitter
US5864428A (en) * 1992-01-13 1999-01-26 Hesline; Raymond Polarizing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504123A (en) * 1981-10-05 1985-03-12 Raytheon Company High efficiency polarizing beamsplitter
US5864428A (en) * 1992-01-13 1999-01-26 Hesline; Raymond Polarizing device

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee