JPS60107612A - Triplet-type photographic lens with postpositive stop - Google Patents
Triplet-type photographic lens with postpositive stopInfo
- Publication number
- JPS60107612A JPS60107612A JP21675283A JP21675283A JPS60107612A JP S60107612 A JPS60107612 A JP S60107612A JP 21675283 A JP21675283 A JP 21675283A JP 21675283 A JP21675283 A JP 21675283A JP S60107612 A JPS60107612 A JP S60107612A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- stop
- triplet
- aperture
- focal length
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/02—Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/12—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only
- G02B9/14—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only arranged + - +
- G02B9/16—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only arranged + - + all the components being simple
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、絞りをレンズ系よりも後方に配’、?’I:
4るトリプレット型写真用レンズに関し、特に、ティ
スフフィルムを使用するティスクノJメラや110タイ
プフイルムを使用する110カメラなと、フィルムフォ
ーマットか小さいカメラに用いられ、l:111角35
°程度を満足する写真用レンズに関するものである。[Detailed Description of the Invention] The present invention provides an arrangement in which the diaphragm is located behind the lens system. 'I:
Regarding the triplet type photographic lens, it is especially used for cameras with a small film format, such as the TISKUNO J-mera that uses TisF film and the 110 camera that uses 110 type film, and the L: 111 square 35
This relates to a photographic lens that satisfies the degree of
一般に、絞りから像面まての距離(以下、これを絞りバ
ックという)を短くすると、絞りを固定したままレンズ
系のみを切換え、広角レンズと望遠レンズとで単一の絞
りを兼用することか可能となり、カメラの小型化や構造
簡略化に有用である。Generally, if you shorten the distance from the aperture to the image plane (hereinafter referred to as aperture back), you can change only the lens system while keeping the aperture fixed, and use a single aperture for both a wide-angle lens and a telephoto lens. This is useful for downsizing and simplifying the structure of cameras.
しかしながら、このように構成しようとすると、望遠レ
ンズにおいても広角レンズにおいても絞りバックは一定
となるので、望遠レンズはその焦点距離に比へて絞りバ
ンクを短(設計せねはならない。すると、望遠レンズを
トリプレット型にした場合、軸外光か光軸に対して著し
くアンバランスな光路を通ることになり、諸収差が発生
しやすくなり良好な描写性能を得ることか困難になる。However, if such a configuration is attempted, the aperture back will be constant for both telephoto and wide-angle lenses, so telephoto lenses must be designed with a short aperture bank compared to their focal length. When the lens is made into a triplet type, off-axis light passes through an optical path that is significantly unbalanced with respect to the optical axis, making it more likely that various aberrations will occur, making it difficult to obtain good depiction performance.
本発明は、このような欠点を解消し、画角35゜程度及
び墾遠比10程度で、かつ、絞りバックか比較的短いl
こもかかわらず、収差補正の良好な絞り後置のトリプレ
ット型写真用レンズをコンパクトな構成のもとに提供す
ることを目的とするものそして、」二記目的を達成する
為に、本発明に係る絞り後置のトリプレット型写真用レ
ンズは、物体側から順に、物体側に凸面を向けた市レン
ズからなる第ルンズ(Ll)、両凹レンズからなる第2
レンズ(L2)、及び両凸レンズからなる第3レンズ(
L3)Q) 31213枚よりなり、かつ、下記の条件
をi、:(り足することを特徴とするものである。The present invention eliminates these drawbacks, and has an angle of view of about 35 degrees, an aperture ratio of about 10, and a comparatively short aperture back.
Nevertheless, it is an object of the present invention to provide a triplet-type photographic lens with a post-diaphragm arrangement that is well-corrected for aberrations and has a compact configuration. The triplet-type photographic lens placed after the aperture consists of, in order from the object side, the first lens (Ll), which is made of a city lens with a convex surface facing the object side, and the second lens, which is made of a biconcave lens.
lens (L2), and a third lens (L2) consisting of a biconvex lens (
L3) Q) It consists of 31213 sheets and is characterized by adding the following conditions: i, :(.
(]) 0.10(c16Δ)(0,25(2) 0.
25< f1/f <0.52(3) −0.3< f
2/f < −0,1但し、ここで、
d6は第3レンズ(1,,3)の像側面(r6)から絞
り(Slまでの軸上間隔、Dは第jレノズ(Ll)の物
体側面(rl)から像面(1・)までのすJ+ 1間隔
、f】は第】レンズ(Ll)の焦点距離、f2は第2レ
ンズ(L2)の焦点距jiilj、 −fは全系の焦点
距離である。(]) 0.10(c16Δ)(0,25(2) 0.
25< f1/f <0.52(3) -0.3< f
2/f < -0,1 However, here, d6 is the axial distance from the image side surface (r6) of the third lens (1, 3) to the aperture stop (Sl), and D is the object of the j-th lens (Ll). J+ 1 interval from the side surface (rl) to the image plane (1.), f] is the focal length of the ]th lens (Ll), f2 is the focal length of the second lens (L2), It is the focal length.
一般に、トリプシン)、 B215真レンズにおいては
、レンズ系の後に配置される絞りfslを後方(像側少
へすらし絞りバックを短くしていくにつれて、Φ411
外光束かレンズ系に対してアンバランスな光路を通るよ
うになるので、コマ収差及び正の歪曲収差か苫しく増加
する傾向にある。また、レンズ系のコンパクト化を図る
為に第]レンズ(Ll)の正の屈折力を強めると、球面
収差か増加する傾向になる。In general, in the B215 true lens, as the aperture fsl placed after the lens system is moved backward (slightly toward the image side) and the aperture back is shortened,
Since the external light flux passes through an optical path that is unbalanced with respect to the lens system, coma aberration and positive distortion tend to increase dramatically. Furthermore, if the positive refractive power of the lens (Ll) is strengthened in order to make the lens system more compact, spherical aberration tends to increase.
従って、不発1jJ1においては、上記目的を達成する
為に、球面収差、コマ収差、及び正の歪曲収差を良好に
袖i1:、しつつ、絞りハ・ツクを短(しレンズ系をコ
ンパクトにすることか要求される。Therefore, in order to achieve the above objectives, in the misfiring 1jJ1, the spherical aberration, coma aberration, and positive distortion are suppressed well, while the aperture diameter is shortened (and the lens system is made compact). That is required.
本発明において、構成を簡単にする為に開口径の不変な
固定絞りを用いると、次のような問題か生しる。ます、
絞り開口径を小さくしてい(と、充分な周辺光量を確保
する為には、絞りfslを物体側に近つけていく必要が
生じ、絞りハックを短くするという本発明の目的を達成
しない。逆に、絞り開口径を大きくしようとすると、周
辺光量確保及び絞りハック短縮の為には有利であるか、
シャー絞り板のバウンドなと機械的な問題か生しるのて
好ましくない。従って、絞り開口径は、所定1屯囲内に
限定されるのである。In the present invention, if a fixed diaphragm with an unchanging aperture diameter is used in order to simplify the configuration, the following problems arise. Masu,
If the aperture aperture diameter is made small (and in order to secure sufficient amount of peripheral light, it becomes necessary to bring the aperture fsl closer to the object side, and the purpose of the present invention, which is to shorten the aperture huck, is not achieved. If you try to increase the aperture diameter, is it advantageous to secure peripheral light amount and shorten the aperture huck?
If the shear aperture plate bounces, it may cause mechanical problems, which is undesirable. Therefore, the aperture diameter is limited to one predetermined area.
条件(1)は、j二連のようζこシャッターと兼用され
る固定絞りを用いる場合に、その絞り開1」径か所定I
Iu囲内に限定される状態において、充分な周辺光量を
確保しつつ絞りバ・ツクを短くする為の条件である。条
件(])の上限を越えてd6か大きくなると、絞りハッ
クは短くなるけれども、限定された絞り開口径の固定絞
りを用いては充分な周辺光量を1irp1呆することか
できない。逆に、条件(]、)の下限を越えてd6を小
さくすることは、絞り/へ・ツクを長くすることになり
、本発明の目的に反する。Condition (1) is that when using a fixed diaphragm that also serves as a double shutter, the diaphragm opening is 1" or the specified I
This is a condition for shortening the aperture back while ensuring a sufficient amount of peripheral light in a state limited to the Iu range. If d6 increases beyond the upper limit of condition (), the aperture huck becomes shorter, but using a fixed aperture with a limited aperture diameter cannot provide a sufficient amount of peripheral light by 1irp1. On the other hand, reducing d6 beyond the lower limit of the conditions (], ) will lengthen the aperture/hook, which is contrary to the purpose of the present invention.
条件(2)及び(3)は共に、詫収差を良好に補正しつ
つレンズ系をコンパクトにする条件である。条件(2)
は、第ルンズ(Llの屈折力を規定するものであり、条
件(2)の上限を越えてflか太き(なると、第ルンズ
(Ll)の正の屈折−力か弱くなりすきて、レンズハッ
クか長(なりコンパクト化か達成できない。逆に、条件
(2)の下限を越えてflか小さくなると、第ルンズ(
Lt)の正の屈折力か強(なりすきて、球面収Z&Q−
歪曲収差の補正か困難になる。Conditions (2) and (3) are both conditions for making the lens system compact while satisfactorily correcting the lateral aberration. Condition (2)
defines the refractive power of the first lens (Ll), and if fl becomes thicker than the upper limit of condition (2), the positive refractive power of the second lens (Ll) becomes weak, and the lens hack It is impossible to achieve compactness if fl is long (and compaction cannot be achieved.Conversely, if fl becomes small beyond the lower limit of condition (2), the first run (
Lt) positive refractive power or strong spherical convergence Z&Q-
It becomes difficult to correct distortion aberration.
条件(:つ)は第2レンズ(L2)の屈折力を規定する
ものであり、条件(3)の上限を越えてf2の絶対値か
小さくなると、第2レンズ(L2)の負の屈折力か強く
なりすき、特にその物体側の面(r3)の負の屈折力か
強くなりずきるので、球面収差の補正か困鈍になる。逆
に、条件(:3)の下限を越えてf’2の絶対値か大き
くなると、第2レンズ(L2)の負の屈折力か弱くなり
すきるの−C、コマ収差の補正か困九になる。Condition (:tsu) defines the refractive power of the second lens (L2), and if the absolute value of f2 becomes smaller than the upper limit of condition (3), the negative refractive power of the second lens (L2) In particular, the negative refractive power of the object-side surface (r3) becomes too strong, making it difficult to correct spherical aberration. On the other hand, if the absolute value of f'2 increases beyond the lower limit of condition (3), the negative refractive power of the second lens (L2) becomes too weak, and it becomes difficult to correct coma aberration. Become.
(4)旧(d+Δ) <0.25
但し、ここで、dlは第ルンズ(L+)の軸上厚である
。条件(4)はレンズ系をコンパクトにしつつコマ収差
を良好に補正する為の条件であり、第ルンズ(L+)の
軸上厚を規定するものである。条件(4)の上限を越え
てd+か大きくなると、第ルンズ(Ll)の厚みか大き
くなりすきでレンズ系のコンパクト性か損なわれる。逆
に、条件(4)の下限を越えてdlか小さくなると、第
ルンズ(Ll)かうすくなりずきてコマ収差の補正か困
難になる。(4) Old (d+Δ) <0.25 However, here, dl is the axial thickness of the th run (L+). Condition (4) is a condition for properly correcting coma aberration while making the lens system compact, and defines the axial thickness of the lens (L+). If d+ increases beyond the upper limit of condition (4), the thickness of the first lens (Ll) increases, which impairs the compactness of the lens system. On the other hand, if dl becomes smaller beyond the lower limit of condition (4), the lens (Ll) becomes thinner, making it difficult to correct comatic aberration.
本発明の後記実施例6及び7においては、レンズ系と絞
りとの間に透明な911行平板(Lf )を配置ν1し
、これを撮影光路内に]111人した状態で無限遠を含
む通常距離ソーンへのフA−カシングかなされ、該平行
平板を撮影光路外へ退避させた状!ルて近接「[1離ソ
ーンへのフメーカシングかなされるように構成されてい
る。このように構成することによってレンズ系を光軸方
向に移動させたり、クローズアンプレンズをレンズ系の
的に装着したりすることなく、フォーカシングか可能と
なり、コンノぐクト性が損なわれない。尚、このような
平行平板(Lf)は絞’l (Slよりも後方(像側)
に配置しても良い。In Embodiments 6 and 7 of the present invention described later, a transparent 911-row flat plate (Lf) is placed between the lens system and the diaphragm, and this is placed in the photographing optical path with 111 people in the normal range including infinity. Focusing on the distance saw is done, and the parallel plate is moved out of the photographing optical path! The lens system is configured so that it can be used for close-up shooting at 1 distance.With this configuration, the lens system can be moved in the optical axis direction, and a close amplifier lens can be attached to the target of the lens system. Focusing is possible without any distortion, and the concentricity is not impaired.In addition, such a parallel plate (Lf) has an aperture of 1 (behind the diaphragm (image side)
It may be placed in
以下、本発明の実施例を示す。Examples of the present invention will be shown below.
(以下余白)
実施例1
↑’=+ 00 1”NO=] : 6.0 2ω=3
4゜曲率半径 軸上面間隔 屈折率(NCL) 分散(
νd)d2=8.16
(L=5.10
dg=20.40
S絞り
望遠比 100
d6Δ知020
1’l/f=0.47
f 2/f =、−,0,20
d、/1)−〇、12
実施例2
f=100 FNO=1:6.0 2ω=3]0曲率半
径 軸上面間隔 屈折率(Nd) 分散(νd)d2=
6.53
d4=4.69
r6”−42,32!0
d6=17.95
S絞り
望遠比 1.02
d s/])−0,18
f、/f=0.50
t”2/f= 0.23
’:1lA)=0.22
実施例3
r 2””229.734
d、 2=8.] 6
d4に734
d6=21.22
5絞り
望遠比 105
d 6/D = 0.20
f+/f=0.48
f 2/f = 0.22
f=100 FNO=1:6.0 2ω=34゜曲率半
径 軸上面間隔 屈折率(Nd ) 分散(νd)r
2=]I94.113
(i2=6.53
r4=27.606
d4=4.69
r6=−50,852
d+、=20.00
S絞り
望遠比 0.99
d6/D=0.20
f、/f=0.45
f2/f−0,23
d+/L)=n、1d
実施例5
f=+001°’NO=] :6.0 2ω=31゜曲
十半iそ 輔1 ifj間隔 屈折率(Nd) 分散(
νd)d2=6.53
d、=4.6g
d6=18.77
S絞り
望遠比 095
d 6A) = 0.20
f、/f=0.40
f2/f=−0,17
d 1/D=0. ] 5
実施例6
f=100 FNO=1 : 6.0 2ω=35゜曲
率半径 軸上面間隔 屈折率(Nd) 分散(νd)c
12=6.74
(1,=5.11
da=6.79
dc=6.05
S絞り
* d 6=d a−4−d b−1−d c 望遠比
+03II Il/D = 0.18
f +/f=0.47
f 2/f =−0,23
d+/D =O,] 4
実施例7
f=]00 FNO=1:6.0 2ω=35゜曲率半
径 軸上面間隔 屈折率(Nd) 分散(νd)Ch=
]、53
(L=7.58
da=6.79
ctc=6.51
S絞り
* d 6=d a−I−d h−I−d c 望遠比
105d6/D=0.19
ft/f=0.38
f2/f= 0.25
d 1/T)= 0.18(Left below) Example 1 ↑'=+ 00 1"NO=]: 6.0 2ω=3
4° radius of curvature Distance between top surfaces of shaft Refractive index (NCL) Dispersion (
νd) d2=8.16 (L=5.10 dg=20.40 S aperture telephoto ratio 100 d6Δknowledge020 1'l/f=0.47 f 2/f =, -, 0, 20 d, /1 )-〇, 12 Example 2 f=100 FNO=1:6.0 2ω=3]0 Radius of curvature Axis spacing Refractive index (Nd) Dispersion (νd) d2=
6.53 d4=4.69 r6"-42,32!0 d6=17.95 S aperture telephoto ratio 1.02 d s/])-0,18 f, /f=0.50 t"2/f = 0.23':1lA)=0.22 Example 3 r 2""229.734 d, 2=8. ] 734 to 6 d4 d6=21.22 5 aperture telephoto ratio 105 d 6/D = 0.20 f+/f=0.48 f 2/f = 0.22 f=100 FNO=1:6.0 2ω= 34° radius of curvature Distance between upper surfaces of the axis Refractive index (Nd) Dispersion (νd) r
2=]I94.113 (i2=6.53 r4=27.606 d4=4.69 r6=-50,852 d+, =20.00 S aperture telephoto ratio 0.99 d6/D=0.20 f, /f=0.45 f2/f-0, 23 d+/L)=n, 1d Example 5 f=+001°'NO=] :6.0 2ω=31° bend 1/5 i so 1 ifj interval Refraction Ratio (Nd) Dispersion (
νd) d2=6.53 d, = 4.6g d6=18.77 S aperture telephoto ratio 095 d 6A) = 0.20 f, /f=0.40 f2/f=-0,17 d 1/D =0. ] 5 Example 6 f = 100 FNO = 1: 6.0 2ω = 35° Radius of curvature Axis spacing Refractive index (Nd) Dispersion (νd) c
12=6.74 (1,=5.11 da=6.79 dc=6.05 S aperture* d 6=d a-4-d b-1-d c Telephoto ratio +03II Il/D = 0.18 f + / f = 0.47 f 2 / f = -0, 23 d + / D = O,] 4 Example 7 f = ] 00 FNO = 1:6.0 2ω = 35° radius of curvature Top surface spacing Refractive index (Nd) Dispersion (νd) Ch=
], 53 (L=7.58 da=6.79 ctc=6.51 S aperture* d 6=d a-I-d h-I-d c Telephoto ratio 105d6/D=0.19 ft/f= 0.38 f2/f=0.25 d1/T)=0.18
第1.3.5’、7.9図はそれぞれ本発明実施例1〜
5のレンズを示す断面図、第2.4,6゜8.10図は
、それぞれ実施例1〜5の収差図、第11図は実施例6
の通常距離フォーカシング状態を示す断面図、第14図
はその収差図、第15図は実施例7の通常距離フォーカ
シング状態を示す断if+i図、第16図はその収差図
、第17図は実施例7のβ−L150の近接距離フォー
カシング状態を示す断面図、第18図はその収差図であ
る。
L+、L2. L3 ; 図面左から順次配列される第
1゜第2.第3レンズ
S ; シャック−を兼用する絞り
rl、 r2−rs ; 図面左から順次配列される各
屈折面の曲率半径
d i、 d 2. °d5; 図面左から順次配列さ
れる各屈折面間の軸上間隔
dc ; i3レンズ像側面から絞りまでの軸−L間隔
14 ; 平行平板、
l、+、rb ; 平行平板の物体側及び像側の面の曲
率半径、
cia;第3レンズの像側面から平行平板の物体側面ま
で・の・軸」二間隔
db; 平行平板の厚み
dc; 平行平板の像側面から絞りまでの軸上間隔。
以−L
出願人 ミノルタカメラ株式会社
第1図
第2図
揶3図
l
第4図
第5 図
t
第7図
1
第8図
球面qd正弦茶ヰ 非欧、伏范 歪曲 φ第 q 図
Lr
Z
第1O図
球面qη雄縫 xr、+製蓋 歪めφ
第11 図
t
第12図
工に釧スL 1lLHj−gr−A、q;t、L 1−
、g −y。
第13図
ノl
i&、iqd f蕉aη′ 4μ点りt−1r jfL
、g、7゜第75図
tFigures 1.3.5' and 7.9 are embodiments 1 to 1 of the present invention, respectively.
2.4 and 6.8.10 are aberration diagrams of Examples 1 to 5, respectively, and FIG. 11 is a cross-sectional view showing the lens of Example 6.
14 is a cross-sectional view showing the normal distance focusing state of Example 7, FIG. 14 is an aberration diagram thereof, FIG. 15 is a cross-sectional if+i diagram showing the normal distance focusing state of Example 7, FIG. 16 is an aberration diagram thereof, and FIG. 17 is an example FIG. 18 is a cross-sectional view showing the close distance focusing state of the β-L150 of No. 7, and its aberration diagram. L+, L2. L3; No. 1, No. 2, and No. 2 arranged sequentially from the left in the drawing. Third lens S; diaphragm rl, r2-rs that also serves as a shack; radii of curvature d i, d 2 of each refractive surface sequentially arranged from the left in the drawing. °d5; Axial distance dc between each refractive surface arranged sequentially from the left in the drawing; i3 Axis-L distance from the lens image side surface to the diaphragm 14; Parallel plate, l, +, rb; Object side and image of parallel plate Radius of curvature of the side surface, cia; distance between the image side of the third lens and the object side of the parallel plate db; thickness dc of the parallel plate; axial distance from the image side of the parallel plate to the aperture stop. Applicant Minolta Camera Co., Ltd. Fig. 1 Fig. 2 Fig. 3 l Fig. 4 Fig. 5 Fig. t Fig. 7 1 Fig. 8 Spherical surface qd Sine brown Fig. 1 O Spherical surface qη male stitch xr, + lid distortion φ Fig. 11 t Fig. 12 Socket hole L 1lLHj-gr-A, q; t, L 1-
, g −y. FIG.
, g, 7° Figure 75 t
Claims (1)
からなる第】レンズ、両凹レンズからなる第2レンズ、
及び両凸1/ンズからなる第3レンズの:3 l!13
枚よりなり、がっ、下記の条件を満足するこよを特徴さ
する絞り後置のトリプレット型写真用レンズ; o、xo< d6/D <0.25 0.25< fI/i’ <052 −〇 3く 土’2/i’ <−0,]但し、ここて、 a6;13レンズの像側面から絞りまでの軸」二間1艙
D:第ルンズの物体側面から像面まての軸」―間1枢f
’+;第】レンズの焦点距離 f°2;第2レンズの焦点距離 f;全系の焦点距離 である。 2、 史に、下記条件を満足することを生、′16′j
Iとする特許請求の範囲第1項記載の絞り後置のトリプ
レット型写真用レンズ; 0.10(d+/’l) <0.25 イIfi L、ここで、 dl;第ルンズの軸」−厚 である。 6、 第3レンズの像側に一!1z行−ゝする板を配し
、これを撮χ光路内に1111人したり撮影光路外へ1
1!!避さぜたりすることによって、フォーカシングか
なされることを特徴とする特1/1請求の:Ii’ff
i囲第1項又は第2項記載の絞り後置のトリフレット型
’Ij’貞用レンズ。[Claims] 1. In order from the object side, a first lens consisting of a positive lens with a convex surface facing the object side, a second lens consisting of a biconcave lens,
and the third lens consisting of biconvex 1/lens: 3 l! 13
A triplet-type photographic lens with a post-diaphragm lens that satisfies the following conditions; o, xo< d6/D <0.25 0.25<fI/i'<052 〇 3ku Sat '2/i'<-0,] Here, a6; 13 Axis from the image side of the lens to the aperture diaphragm D: Axis from the object side of the lens to the image plane ” - between 1 and 3 f
'+; Focal length of lens f°2; Focal length of second lens f; Focal length of the entire system. 2. The history requires that the following conditions be met.
A triplet-type photographic lens after the diaphragm according to claim 1, defined as I; 0.10 (d+/'l) <0.25 i Ifi L, where dl; axis of the 1st lunion'- It is thick. 6. One on the image side of the third lens! A board with 1z rows is arranged, and this is placed in the photographing optical path or outside the photographing optical path.
1! ! Claim 1/1: Ii'ff, characterized in that focusing is performed by avoiding
A trifret-type 'Ij' lens located after the diaphragm as described in item 1 or 2 of the i-circle.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21675283A JPS60107612A (en) | 1983-11-16 | 1983-11-16 | Triplet-type photographic lens with postpositive stop |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21675283A JPS60107612A (en) | 1983-11-16 | 1983-11-16 | Triplet-type photographic lens with postpositive stop |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60107612A true JPS60107612A (en) | 1985-06-13 |
Family
ID=16693363
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21675283A Pending JPS60107612A (en) | 1983-11-16 | 1983-11-16 | Triplet-type photographic lens with postpositive stop |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60107612A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63180924A (en) * | 1987-01-22 | 1988-07-26 | Asahi Optical Co Ltd | Lens for copying |
US4787724A (en) * | 1986-02-07 | 1988-11-29 | Minolta Camera Kabushiki Kaisha | Triplet type objective with a diaphragm arranged behind the lens system |
KR20030008835A (en) * | 2001-07-20 | 2003-01-29 | 최대일 | A subminiature lens system |
US10585262B2 (en) | 2015-02-04 | 2020-03-10 | Largan Precision Co., Ltd. | Optical lens assembly and image capturing device |
-
1983
- 1983-11-16 JP JP21675283A patent/JPS60107612A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4787724A (en) * | 1986-02-07 | 1988-11-29 | Minolta Camera Kabushiki Kaisha | Triplet type objective with a diaphragm arranged behind the lens system |
JPS63180924A (en) * | 1987-01-22 | 1988-07-26 | Asahi Optical Co Ltd | Lens for copying |
KR20030008835A (en) * | 2001-07-20 | 2003-01-29 | 최대일 | A subminiature lens system |
US10585262B2 (en) | 2015-02-04 | 2020-03-10 | Largan Precision Co., Ltd. | Optical lens assembly and image capturing device |
US12019210B2 (en) | 2015-02-04 | 2024-06-25 | Largan Precision Co., Ltd. | Optical lens assembly and image capturing device |
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