GB1002611A - Improvements in diffraction gratings - Google Patents

Improvements in diffraction gratings

Info

Publication number
GB1002611A
GB1002611A GB3517860A GB3517860A GB1002611A GB 1002611 A GB1002611 A GB 1002611A GB 3517860 A GB3517860 A GB 3517860A GB 3517860 A GB3517860 A GB 3517860A GB 1002611 A GB1002611 A GB 1002611A
Authority
GB
United Kingdom
Prior art keywords
grating
disc
gratings
cells
oct
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
GB3517860A
Inventor
David Williams Holme Hampshire
Arthur Timothy Torlesse
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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB3517860A priority Critical patent/GB1002611A/en
Publication of GB1002611A publication Critical patent/GB1002611A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1814—Diffraction gratings structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Optical Transform (AREA)

Abstract

1,002,611. Electric selective signalling systems. PLESSEY CO. Ltd. Oct. 12, 1961 [Oct. 13, 1960], No. 35178/60. Heading G4H. [Also in Division G2] A compound grating having more than three gratings in which the number of lines on one grating differs from the next in series according to a binary law is used as the coding disc in a digitizer using moirÚ fringes. The grating 1, in the form of a disc having annular gratings is mounted on a rotatable shaft 6 and a further grating plate 7, divided into two C-shaped parts relatively displaced with respect to the axis of rotation of the disc 1, is mounted close to the disc 1. Two photo-electric cells 8 are aligned with each grating except the outermost which has only one and a light source 9 provides a parallel beam of light through the disc and the plate. The disc 1 is rotated in accordance with an input signal causing a variation in the light transmitted by the gratings and received by the photo-cells. A reflection grating may be used in which case the cells and the source are on the same side of the grating 1.
GB3517860A 1960-10-13 1960-10-13 Improvements in diffraction gratings Expired GB1002611A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3517860A GB1002611A (en) 1960-10-13 1960-10-13 Improvements in diffraction gratings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3517860A GB1002611A (en) 1960-10-13 1960-10-13 Improvements in diffraction gratings

Publications (1)

Publication Number Publication Date
GB1002611A true GB1002611A (en) 1965-08-25

Family

ID=10374748

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3517860A Expired GB1002611A (en) 1960-10-13 1960-10-13 Improvements in diffraction gratings

Country Status (1)

Country Link
GB (1) GB1002611A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5694247A (en) * 1994-05-02 1997-12-02 U.S. Philips Corporation Optical transmissive component with anti-reflection gratings
DE19635046A1 (en) * 1996-08-29 1998-03-05 Nis Ingenieurgesellschaft Mbh Spectroanalyser for determining element compositions and concentrations
US5825547A (en) * 1993-08-06 1998-10-20 Commonwealth Scientific And Industrial Research Organisation Diffractive device for generating one or more diffracting images including a surface relief structure at least partly arranged in a series of tracks
US6088161A (en) * 1993-08-06 2000-07-11 The Commonwealth Of Australia Commonwealth Scientific And Industrial Research Organization Diffractive device having a surface relief structure which generates two or more diffraction images and includes a series of tracks

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5825547A (en) * 1993-08-06 1998-10-20 Commonwealth Scientific And Industrial Research Organisation Diffractive device for generating one or more diffracting images including a surface relief structure at least partly arranged in a series of tracks
US6088161A (en) * 1993-08-06 2000-07-11 The Commonwealth Of Australia Commonwealth Scientific And Industrial Research Organization Diffractive device having a surface relief structure which generates two or more diffraction images and includes a series of tracks
US5694247A (en) * 1994-05-02 1997-12-02 U.S. Philips Corporation Optical transmissive component with anti-reflection gratings
DE19635046A1 (en) * 1996-08-29 1998-03-05 Nis Ingenieurgesellschaft Mbh Spectroanalyser for determining element compositions and concentrations

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