JPS6437502A - Diffraction grating - Google Patents
Diffraction gratingInfo
- Publication number
- JPS6437502A JPS6437502A JP19397287A JP19397287A JPS6437502A JP S6437502 A JPS6437502 A JP S6437502A JP 19397287 A JP19397287 A JP 19397287A JP 19397287 A JP19397287 A JP 19397287A JP S6437502 A JPS6437502 A JP S6437502A
- Authority
- JP
- Japan
- Prior art keywords
- blaze
- grooves
- wavelengths
- engraved
- diffraction grating
- 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.)
- Pending
Links
Landscapes
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Abstract
PURPOSE:To obtain a reflection type diffraction grating which has flat diffraction efficiency over a wide wavelength range by setting blaze wavelengths over a necessary frequency range and engraving repetitive grooves in a glass substrate in parallel at a tilt angle corresponding to the wavelengths. CONSTITUTION:A blaze wavelength lambdab and a blaze wavelength thetab have a relation lambdab=2dSinthetab. (d: reciprocal of the number of engraved grooves per unit length.) For the purpose, the blaze wavelengths are selected and then a blaze angle thetab is found from an expression; and small glass substrates where grooves are engraved at this angle are arrayed in a matrix. In this case, cutters having blaze angles are used to engrave grooves by every two-pitch shift from conventional engraved grooves and thus the same effect with a matrix array is obtained. Consequently, the diffraction grating which has flat diffracted light efficiency over a wide wavelength range is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19397287A JPS6437502A (en) | 1987-08-03 | 1987-08-03 | Diffraction grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19397287A JPS6437502A (en) | 1987-08-03 | 1987-08-03 | Diffraction grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6437502A true JPS6437502A (en) | 1989-02-08 |
Family
ID=16316836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19397287A Pending JPS6437502A (en) | 1987-08-03 | 1987-08-03 | Diffraction grating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6437502A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0383307A2 (en) * | 1989-02-15 | 1990-08-22 | Canon Kabushiki Kaisha | Image reading apparatus |
| JP2013522667A (en) * | 2010-03-17 | 2013-06-13 | デルファイ・テクノロジーズ・インコーポレーテッド | Diffraction type combiner for head-up color display |
| CN107884855A (en) * | 2017-11-21 | 2018-04-06 | 上海理工大学 | The design method of three glittering face echelle grating of detecting light spectrum scope can be widened |
-
1987
- 1987-08-03 JP JP19397287A patent/JPS6437502A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0383307A2 (en) * | 1989-02-15 | 1990-08-22 | Canon Kabushiki Kaisha | Image reading apparatus |
| JP2013522667A (en) * | 2010-03-17 | 2013-06-13 | デルファイ・テクノロジーズ・インコーポレーテッド | Diffraction type combiner for head-up color display |
| CN107884855A (en) * | 2017-11-21 | 2018-04-06 | 上海理工大学 | The design method of three glittering face echelle grating of detecting light spectrum scope can be widened |
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