JPS57164726A - Information mark display device - Google Patents
Information mark display deviceInfo
- Publication number
- JPS57164726A JPS57164726A JP5075181A JP5075181A JPS57164726A JP S57164726 A JPS57164726 A JP S57164726A JP 5075181 A JP5075181 A JP 5075181A JP 5075181 A JP5075181 A JP 5075181A JP S57164726 A JPS57164726 A JP S57164726A
- Authority
- JP
- Japan
- Prior art keywords
- light
- make
- grating
- marks
- reference light
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/18—Signals indicating condition of a camera member or suitability of light
- G03B17/20—Signals indicating condition of a camera member or suitability of light visible in viewfinder
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Indication In Cameras, And Counting Of Exposures (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Holo Graphy (AREA)
Abstract
PURPOSE:To make the displaying of information marks which are easy to make and do not give any adverse influence upon image information of a finder, etc., possible by displaying the hologram image by the N-order diffracted light of a relief diffraction grating. CONSTITUTION:A unit grating is constituted of two slopes 27, 28 of a transparent adhesive material 18 of a relief diffraction grating which forms a focal plate 8 together with a transparent base plate 15 provided with a split distance measuring part 16, a transparent member 19 for cover, etc. A dielectric reflection film is vapor-deposited according to marks on the surface 28 of acute in- clination. The illuminating light from a reference light source 9 transmits through the surface 27 and reflects on the surface 28 after this, then the hologram reconstructed light 24 of the mark by the diffracted light of N-th order is emitted in the direction of the observation eye in accordance with the equationI. It is possible to increase the pitch P of the grating and to display the information marks which are easy to make, and do not give any adverse influence upon image information of a finder, etc. by utilizing this N-order diffracted light. Here, theta: the incident angle of the reference light, lambda: the wavelength of the reference light.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5075181A JPS57164726A (en) | 1981-04-03 | 1981-04-03 | Information mark display device |
| US06/283,014 US4374612A (en) | 1980-07-25 | 1981-07-13 | Mark indicating device for optical apparatus |
| DE19813129357 DE3129357A1 (en) | 1980-07-25 | 1981-07-24 | MARKING INDICATOR FOR AN OPTICAL DEVICE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5075181A JPS57164726A (en) | 1981-04-03 | 1981-04-03 | Information mark display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57164726A true JPS57164726A (en) | 1982-10-09 |
| JPS6258494B2 JPS6258494B2 (en) | 1987-12-07 |
Family
ID=12867534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5075181A Granted JPS57164726A (en) | 1980-07-25 | 1981-04-03 | Information mark display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57164726A (en) |
-
1981
- 1981-04-03 JP JP5075181A patent/JPS57164726A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6258494B2 (en) | 1987-12-07 |
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