KR970049124A - Lens unit for copier - Google Patents

Lens unit for copier Download PDF

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Publication number
KR970049124A
KR970049124A KR1019950056292A KR19950056292A KR970049124A KR 970049124 A KR970049124 A KR 970049124A KR 1019950056292 A KR1019950056292 A KR 1019950056292A KR 19950056292 A KR19950056292 A KR 19950056292A KR 970049124 A KR970049124 A KR 970049124A
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KR
South Korea
Prior art keywords
lens
lens unit
refractive power
copier
focal length
Prior art date
Application number
KR1019950056292A
Other languages
Korean (ko)
Inventor
최상경
Original Assignee
김주용
현대전자산업 주식회사
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.)
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Publication date
Application filed by 김주용, 현대전자산업 주식회사 filed Critical 김주용
Priority to KR1019950056292A priority Critical patent/KR970049124A/en
Publication of KR970049124A publication Critical patent/KR970049124A/en

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Abstract

복사기용 렌즈유니트가 개시되어 있다.Disclosed is a lens unit for a copier.

이 개시된 렌즈유니트는 물체쪽으로부터, 입사되는 광을 소정의 각으로 수렴하도록 정(正)의 굴절력을 가지는 제1렌즈와, 부(負)의 굴절력을 가지는 제2렌즈와, 정(正)의 굴절력을 가지는 제3렌즈로 구성되며 아래의 설명된 조건 즉,The disclosed lens unit includes a first lens having positive refractive power, a second lens having negative refractive power, and a positive lens so as to converge incident light from an object toward a predetermined angle. It consists of a third lens having refractive power and the conditions described below,

0.18＜f2/fi＜0.40.18 <f 2 / f i <0.4

1.70＜ni+vj/200≤1.951.70 <n i + v j /200≤1.95

0.6＜-r2/r4＜2.00.6 <-r 2 / r 4 <2.0

1.0＜-r5/r6＜2.01.0 <-r 5 / r 6 <2.0

0.35＜di/dt＜0.60.35 <d i / d t <0.6

0.08＜dt/f＜0.150.08 <d t /f<0.15

여기서, fi:각 렌즈유니트의 초점거리(i=1,2),vi:제i렌즈의 아베수, ri:제j면의 곡률반경, dt:전유니트 사이의 길이, fi:제i렌즈의 초점거리, ni:제i렌즈의 d선의 굴절률, 그리고 dj:제j면과 제j+1면의 사이의 간격을 만족하는 것을 특징으로한다.Where f i : focal length of each lens unit (i = 1, 2), v i : Abbe number of the i-th lens, r i : radius of curvature of the j-th plane, d t : length between all units, f i I: the focal length of the i-th lens, n i : the refractive index of the d-line of the i-th lens, and d j : the distance between the j-th surface and the j + 1th surface.

Description

복사기용 렌즈유니트Lens unit for copier

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명에 따른 복사기용 렌즈유니트의 광학적 배치를 보인 단면도.1 is a cross-sectional view showing an optical arrangement of a lens unit for a copier according to the present invention.

제2도는 본 발명에 따른 복사기용 렌즈유니트의 수차를 나타낸 수차특성도.2 is aberration characteristic diagram showing aberration of the lens unit for a copier according to the present invention.

Claims (2)

물체쪽으로부터, 입사되는 광을 소정의 각으로 수렴하도록 정(正)의 굴절력을 가지는 제1렌즈와, 부(負)의 굴절력을 가지는 제2렌즈와, 정(正)의 굴절력을 가지는 제3렌즈로 구성되며 아래의 설명된 조건 즉,A first lens having positive refractive power, a second lens having negative refractive power, and a third having positive refractive power so as to converge the incident light from the object side at a predetermined angle; Lens, and the conditions described below, 0.18＜f2/fi＜0.40.18 <f 2 / f i <0.4 1.70＜ni+vj/200≤1.951.70 <n i + v j /200≤1.95 0.6＜-r2/r4＜2.00.6 <-r 2 / r 4 <2.0 1.0＜-r5/r6＜2.01.0 <-r 5 / r 6 <2.0 0.35＜di/dT＜0.60.35 <d i / d T <0.6 0.08＜dT/f＜0.150.08 <d T / f <0.15 여기서, fi:각 렌즈유니트의 초점거리(i=1,2),vi:제i렌즈의 아베수, ri:제j면의 곡률반경, dT:전유니트 사이의 길이, fi:제i렌즈의 초점거리, ni:제i렌즈의 d선의 굴절률, 그리고 dj:제j면과 제j+1면의 사이의 간격을 만족하는 것을 특징으로 하는 복사기용 렌즈유니트.Where f i : focal length of each lens unit (i = 1, 2), v i : Abbe number of the i-th lens, r i : radius of curvature of the j-th plane, d T : length between all units, f i A focal length of the i-th lens, n i : a refractive index of the d-line of the i-th lens, and d j : a lens unit for a copier, characterized in that it satisfies the distance between the j-th surface and the j + 1th surface. 제1항에 있어서, 아래 도표를 만족하는 것을 특징으로 하는 복사기용 렌즈유니트.The lens unit for a photocopier according to claim 1, wherein the following table is satisfied. F:NO=1:8.5 f=195㎜=21.5°F: NO = 1: 8.5 f = 195 mm = 21.5 ° 곡률반경(r) 렌즈간의 거리(d) 굴절률(n) 분산(v)Radius of curvature (r) distance between lenses (d) refractive index (n) dispersion (v) 1 33.684 8.3 1.569 56.11 33.684 8.3 1.569 56.1 2 43.821 3.88 공기2 43.821 3.88 Air 3 -48.883 2.0 1.581 40.93 -48.883 2.0 1.581 40.9 4 48.883 2.0 공기4 48.883 2.0 Air 5 81.005 4.0 1.693 53.35 81.005 4.0 1.693 53.3 6 -48.1836 -48.183 f2/fi=0.21137f 2 / f i = 0.21137 ni+vj/200=1.849n i + v j /200=1.849 -r2/r4 -r 2 / r 4 -r5/r6=1.6485-r 5 / r 6 = 1.6485 di/dT=0.411298d i / d T = 0.411298 dT/f=0.10348d T /f=0.10348 n2-n1=0.012n 2 -n 1 = 0.012 ※ 참고사항: 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the original application.
KR1019950056292A 1995-12-26 1995-12-26 Lens unit for copier KR970049124A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950056292A KR970049124A (en) 1995-12-26 1995-12-26 Lens unit for copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950056292A KR970049124A (en) 1995-12-26 1995-12-26 Lens unit for copier

Publications (1)

Publication Number Publication Date
KR970049124A true KR970049124A (en) 1997-07-29

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ID=66617962

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950056292A KR970049124A (en) 1995-12-26 1995-12-26 Lens unit for copier

Country Status (1)

Country Link
KR (1) KR970049124A (en)

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