KR100287735B1 - Thin film type lens - Google Patents
Thin film type lens Download PDFInfo
- Publication number
- KR100287735B1 KR100287735B1 KR1019970036809A KR19970036809A KR100287735B1 KR 100287735 B1 KR100287735 B1 KR 100287735B1 KR 1019970036809 A KR1019970036809 A KR 1019970036809A KR 19970036809 A KR19970036809 A KR 19970036809A KR 100287735 B1 KR100287735 B1 KR 100287735B1
- Authority
- KR
- South Korea
- Prior art keywords
- lens
- ccd
- lens group
- thin film
- diffractive
- Prior art date
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- Color Television Image Signal Generators (AREA)
Abstract
PURPOSE: A thin film type lens is provided to correct a color aberration by using a diffractive lens portion and reduce fabricating costs by decreasing the number of lens. CONSTITUTION: A thin film lens is formed with the first lens group(L1), the second lens group(L2), an iris diagram(I), a CCD(charge Coupled Device), a diffractive lens portion(L3), and a dummy glass(DG). The first lens group(L1) is formed by a concave lens having a negative refractive index. The second lens group(L2) is formed by a convex lens having a positive refractive index. The iris diagram(I) is installed between the first lens group(L1) and the second lens group(L2) in order to control the amount of light. The CCD(CCD) is used for digitalizing an image formed by the lens group(L2) and memorizing the digitalized image. The diffractive lens portion(L3) is installed between the second lens group(L2) and the CCD(CCD) in order to correct various aberrations. The dummy glass(DG) is installed between the diffractive lens portion(L3) and the CCD(CCD).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019970036809A KR100287735B1 (en) | 1997-08-01 | 1997-08-01 | Thin film type lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019970036809A KR100287735B1 (en) | 1997-08-01 | 1997-08-01 | Thin film type lens |
Publications (1)
Publication Number | Publication Date |
---|---|
KR100287735B1 true KR100287735B1 (en) | 2001-04-16 |
Family
ID=37515061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019970036809A KR100287735B1 (en) | 1997-08-01 | 1997-08-01 | Thin film type lens |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100287735B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100712373B1 (en) * | 2005-11-22 | 2007-05-02 | 송순향 | Optical system for security camera using aspheric surface |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06242373A (en) * | 1992-12-21 | 1994-09-02 | Asahi Optical Co Ltd | Chromatic aberration correcting single lens |
-
1997
- 1997-08-01 KR KR1019970036809A patent/KR100287735B1/en not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06242373A (en) * | 1992-12-21 | 1994-09-02 | Asahi Optical Co Ltd | Chromatic aberration correcting single lens |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100712373B1 (en) * | 2005-11-22 | 2007-05-02 | 송순향 | Optical system for security camera using aspheric surface |
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Date | Code | Title | Description |
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E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
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Payment date: 20080102 Year of fee payment: 8 |
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