KR100287735B1 - Thin film type lens - Google Patents

Thin film type lens Download PDF

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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
Application number
KR1019970036809A
Other languages
Korean (ko)
Inventor
Ho Yeong Choi
Original Assignee
Lg Electronics Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lg Electronics Inc filed Critical Lg Electronics Inc
Priority to KR1019970036809A priority Critical patent/KR100287735B1/en
Application granted granted Critical
Publication of KR100287735B1 publication Critical patent/KR100287735B1/en

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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).
KR1019970036809A 1997-08-01 1997-08-01 Thin film type lens KR100287735B1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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