JPS5638072A - Erasing level monitoring method of thermoplastic resin base hologram material - Google Patents
Erasing level monitoring method of thermoplastic resin base hologram materialInfo
- Publication number
- JPS5638072A JPS5638072A JP5242879A JP5242879A JPS5638072A JP S5638072 A JPS5638072 A JP S5638072A JP 5242879 A JP5242879 A JP 5242879A JP 5242879 A JP5242879 A JP 5242879A JP S5638072 A JPS5638072 A JP S5638072A
- Authority
- JP
- Japan
- Prior art keywords
- hologram material
- hologram
- erasing
- thermoplastic
- erasing level
- 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
Landscapes
- Holo Graphy (AREA)
Abstract
PURPOSE: To observe the erasing level of a thermoplastic hologram level easily and surely by optically detecting the recording information or COARSE deformation structure remaining in the thermoplastic hologram material.
CONSTITUTION: An optical system is constituted by a thermoplastic hologram material after erasing processing as, for example, a target for monitoring, a converging lens screen 34, etc. It in this optical system the luminous flux from a spot light source is irradiated as parallel luminous fluxes to a hologram material 30 and is then converged by a lens 32, a spot image is formed on the screen 34 if the hologram material 30 is of a smooth surface having no unevenness. Whereas, if the erasing processing of the hologram material 30 is imperfect, it results in that the spot image on the screen 34 accompanies halo rings. The distribution or intensity thereof is larger as the erasing level of the hologram is lower; therefore, the erasing level is decided by observing the halo rings.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5242879A JPS5638072A (en) | 1979-04-27 | 1979-04-27 | Erasing level monitoring method of thermoplastic resin base hologram material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5242879A JPS5638072A (en) | 1979-04-27 | 1979-04-27 | Erasing level monitoring method of thermoplastic resin base hologram material |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5638072A true JPS5638072A (en) | 1981-04-13 |
JPS6255668B2 JPS6255668B2 (en) | 1987-11-20 |
Family
ID=12914491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5242879A Granted JPS5638072A (en) | 1979-04-27 | 1979-04-27 | Erasing level monitoring method of thermoplastic resin base hologram material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5638072A (en) |
-
1979
- 1979-04-27 JP JP5242879A patent/JPS5638072A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6255668B2 (en) | 1987-11-20 |
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