GB1002611A - Improvements in diffraction gratings - Google Patents
Improvements in diffraction gratingsInfo
- 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
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.
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)
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 |
-
1960
- 1960-10-13 GB GB3517860A patent/GB1002611A/en not_active Expired
Cited By (4)
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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