IE42183L - N-alicyclic polyamides - Google Patents
N-alicyclic polyamidesInfo
- Publication number
- IE42183L IE42183L IE255775A IE255775A IE42183L IE 42183 L IE42183 L IE 42183L IE 255775 A IE255775 A IE 255775A IE 255775 A IE255775 A IE 255775A IE 42183 L IE42183 L IE 42183L
- Authority
- IE
- Ireland
- Prior art keywords
- low
- pass
- pass characteristics
- moire
- return
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyamides (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Artificial Filaments (AREA)
Abstract
PURPOSE: To effectively remove normal moire and return moire and to read and obtain an image of high picture quality with high precision by providing an optical means which has at least two kind of low-pass characteristics in the optical path between an image forming means and a photodetecting means. CONSTITUTION: The optical means 20 consists of low-pass filters 11 and 12 composed of two transparent optical members in the same shape and has the mutually different low-pass characteristics in the array direction of image pickup elements, and those two low-pass filters 11 and 12 are provided in the optical path between the image forming means 4 and photodetecting means 5 at specific distances from the photodetecting means 5 respectively. The low-pass filter 11 has the low-pass characteristics that the MTF value is 0 in a low-frequency range and the normal moire phenomenon is therefore removed. The low-pass filter 12 has the low-pass characteristics that the MTF value becomes 0 almost at a spatial frequency where the return response component of the low-pass characteristics becomes maximum and then the return moire phenomenon is removed[JPS5196894A]
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US54215675A | 1975-01-20 | 1975-01-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE42183L true IE42183L (en) | 1976-07-20 |
| IE42183B1 IE42183B1 (en) | 1980-06-18 |
Family
ID=24162577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE255775A IE42183B1 (en) | 1975-01-20 | 1975-11-24 | Fromation of n-alicyclic polyamides |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5196894A (en) |
| DE (1) | DE2558166A1 (en) |
| FR (1) | FR2297873A1 (en) |
| GB (1) | GB1503081A (en) |
| IE (1) | IE42183B1 (en) |
| IT (1) | IT1051460B (en) |
-
1975
- 1975-11-24 IE IE255775A patent/IE42183B1/en unknown
- 1975-12-09 IT IT7002075A patent/IT1051460B/en active
- 1975-12-23 DE DE19752558166 patent/DE2558166A1/en not_active Withdrawn
-
1976
- 1976-01-19 FR FR7601278A patent/FR2297873A1/en active Granted
- 1976-01-19 JP JP51004850A patent/JPS5196894A/en active Pending
- 1976-01-20 GB GB215176A patent/GB1503081A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5196894A (en) | 1976-08-25 |
| GB1503081A (en) | 1978-03-08 |
| FR2297873A1 (en) | 1976-08-13 |
| FR2297873B1 (en) | 1979-03-23 |
| IE42183B1 (en) | 1980-06-18 |
| IT1051460B (en) | 1981-04-21 |
| DE2558166A1 (en) | 1976-07-22 |
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