GB803347A - Improvements in or relating to optical systems - Google Patents

Improvements in or relating to optical systems

Info

Publication number
GB803347A
GB803347A GB24901/55A GB2490155A GB803347A GB 803347 A GB803347 A GB 803347A GB 24901/55 A GB24901/55 A GB 24901/55A GB 2490155 A GB2490155 A GB 2490155A GB 803347 A GB803347 A GB 803347A
Authority
GB
United Kingdom
Prior art keywords
absorption
modulator
aug
photo
semi
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
GB24901/55A
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.)
Siemens Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
Siemens AG
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 Siemens Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Publication of GB803347A publication Critical patent/GB803347A/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
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/111—Anti-reflection coatings using layers comprising organic materials

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

803,347. Semi-conductor devices. SIEMENSSCHUCKERTWERKE A.G. Aug. 30, 1955 [Aug. 30, 1954], No. 24901/55. Addition to 719,873. Drawings to Specification. Class 37. [Also in Groups XX and XL (b)] An optical system comprises an active optical element consisting of gallium phosphide. The element may be used as a lens, prism, filter, semi-permeable reflector or a photo-modulator. Details are given of the values of the absorption constant and refractive index of gallium phosphide showing that absorption is low over a large part of the visible spectrum, down to 0.54 Á. The values are compared with those for a thallium bromide iodide mixed crystal. The absorption characteristic may be varied by injecting charge carriers (electrons or holes) into the material to provide a photo-modulator. Reflection may be reduced by providing a reflection reducing layer on the element.
GB24901/55A 1954-08-30 1955-08-30 Improvements in or relating to optical systems Expired GB803347A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE803347X 1954-08-30

Publications (1)

Publication Number Publication Date
GB803347A true GB803347A (en) 1958-10-22

Family

ID=6721452

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24901/55A Expired GB803347A (en) 1954-08-30 1955-08-30 Improvements in or relating to optical systems

Country Status (1)

Country Link
GB (1) GB803347A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0529963A2 (en) * 1991-08-22 1993-03-03 Texas Instruments Incorporated Crystal growth process for large area GaAs and infrared window/dome made therefrom

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0529963A2 (en) * 1991-08-22 1993-03-03 Texas Instruments Incorporated Crystal growth process for large area GaAs and infrared window/dome made therefrom
EP0529963A3 (en) * 1991-08-22 1995-06-14 Texas Instruments Inc

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