JPH04309834A - Lens inspection device - Google Patents
Lens inspection deviceInfo
- Publication number
- JPH04309834A JPH04309834A JP7510991A JP7510991A JPH04309834A JP H04309834 A JPH04309834 A JP H04309834A JP 7510991 A JP7510991 A JP 7510991A JP 7510991 A JP7510991 A JP 7510991A JP H04309834 A JPH04309834 A JP H04309834A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- chart
- imaging
- image
- television
- 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.)
- Granted
Links
- 238000007689 inspection Methods 0.000 title claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 238000003384 imaging method Methods 0.000 claims description 49
- 238000012360 testing method Methods 0.000 claims description 36
- 238000005286 illumination Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 8
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 241000276498 Pollachius virens Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
Description
【０００１】0001
【産業上の利用分野】本発明はレンズの性能を検査する
ための装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for testing the performance of lenses.
【０００２】0002
【従来の技術】従来のレンズ検査装置に、投影器を用い
た逆投影式の装置がある。これは、被験レンズの像面側
にチャート、コンデンサーレンズ、光源を配し、被験レ
ンズの前方のスクリーンにチャートの像を投影する方式
である。2. Description of the Related Art Conventional lens inspection apparatus include a back projection type apparatus using a projector. This is a method in which a chart, a condenser lens, and a light source are arranged on the image plane side of the test lens, and the image of the chart is projected onto a screen in front of the test lens.
【０００３】この方式は、検査者がスクリーン上に画面
全体のチャート像を一度に検査できる利点があるが、部
屋全体を真っ暗にする必要があり検査者の眼に負担がか
かる。また、被験レンズの焦点距離が長い時はスクリー
ン側と被験レンズ側に最低二人の検査者が必要となる。
さらに、スペース的にも大きな暗室が必要となり省力化
・コストダウン化の妨げになっている。This method has the advantage that the examiner can examine the entire chart image on the screen at once, but it requires the entire room to be completely dark, which puts a strain on the examiner's eyes. Furthermore, when the focal length of the lens to be tested is long, at least two examiners are required on the screen side and on the side of the test lens. Furthermore, a large darkroom is required in terms of space, which hinders efforts to save labor and reduce costs.
【０００４】0004
【発明が解決しようとする課題】本発明は工場内の普通
の居室内で使用できるレンズの検査装置を提供するもの
で、更には従来の検査装置に比べて性能上遜色のない装
置を提供するものである。[Problems to be Solved by the Invention] The present invention provides a lens inspection device that can be used in a normal living room in a factory, and further provides a device that is comparable in performance to conventional inspection devices. It is something.
【０００５】[0005]
【課題を解決するための手段】被験レンズの像面側に配
される試験用のチャートと、チャートを照明する照明手
段と、被験レンズを通してチャートの軸上位置を撮像す
るためのテレビ撮像手段と、チャートの軸外位置（周辺
）を撮像するためのテレビ撮像手段と、夫々のテレビ撮
像手段の出力映像を観察するためテレビモニターを設け
る。[Means for Solving the Problems] A test chart arranged on the image plane side of a test lens, an illumination means for illuminating the chart, and a television imaging means for imaging the axial position of the chart through the test lens. , a television imaging means for imaging the off-axis position (periphery) of the chart, and a television monitor for observing the output images of the respective television imaging means.
【０００６】また性能面に着目すると、被験レンズの像
面側にチャートを配し、これに光源を用いて逆投影した
光束を結像レンズを用いて結像させ、この結像面に撮像
素子を配し、この撮像素子上のチャート像をテレビモニ
ターで観察する装置で、前記逆投影した光束の結像位置
は無限遠から２０ｆ（ｆ：被験レンズの焦点距離）の間
にあり、チャート上の検査するための縞の最大本数（１
ｍｍ当たり、黒白で１本に数える）をＮとし、撮像素子
の１ｍｍ当たりの画素数をＭとし、結像レンズの焦点距
離をＦとした時、
３（２Ｎ／Ｍ）＞Ｆ／ｆ＞０．９（２Ｎ／Ｍ）の関係を
満たし、被験レンズの光軸中心のチャートに対する結像
レンズと周辺のチャートに対する結像レンズを少なくと
も備える。Also, focusing on performance, a chart is placed on the image plane side of the test lens, a light beam is back-projected onto the chart using a light source, and an image is formed using an imaging lens. The chart image on the image sensor is observed on a TV monitor. Maximum number of stripes to inspect (1
(counting black and white as one per mm) is N, the number of pixels per 1 mm of the image sensor is M, and the focal length of the imaging lens is F, then 3 (2N/M)>F/f>0 .9(2N/M), and includes at least an imaging lens for the chart at the center of the optical axis of the test lens and an imaging lens for the surrounding charts.
【０００７】[0007]
【実施例】実施例の具体的構成を説明する前に上述の式
に関連する事項を説明する。[Embodiment] Before explaining the specific structure of the embodiment, matters related to the above-mentioned formula will be explained.
【０００８】まず逆投影した光束の結像位置は無限遠で
も良いが、通常被験レンズの最良性能の物体距離は有限
距離であるため、その有限距離近傍に設定したほうが良
い。ただし、２０ｆよりは遠いほうが良い。この場合結
像レンズには収斂状態の光束が入射するため結像レンズ
は超無限の状態にピント調整しておけば良い。First, the imaging position of the back-projected light beam may be set at infinity, but since the object distance that normally provides the best performance of the tested lens is a finite distance, it is better to set it near that finite distance. However, it is better to be farther away than 20f. In this case, since a convergent light beam enters the imaging lens, it is sufficient to adjust the focus of the imaging lens to a super-infinite state.
【０００９】また、チャート上の縞の最大本数と撮像素
子の画素数と被験レンズの焦点距離と結像レンズの焦点
距離との関係は、上式を満足する必要がある。つまりこ
の式は、チャート上の縞を効率よくテレビ画面上に解像
するための条件式である。上限値以上では、チャート上
の縞の最大本数は解像するが必要以上に倍率が大きくな
りテレビ画面上にチャートの一部しか入らなくなってし
まう。下限値以下では、前記縞の最大本数のものがテレ
ビ画面上に解像しくなってしまう。さらに周辺チャート
から出射する光束の主光線とチャート面とのなす角をθ
とした時、周Furthermore, the relationship between the maximum number of stripes on the chart, the number of pixels of the image sensor, the focal length of the test lens, and the focal length of the imaging lens must satisfy the above equation. In other words, this formula is a conditional formula for efficiently resolving the stripes on the chart on the television screen. If the upper limit is exceeded, the maximum number of stripes on the chart will be resolved, but the magnification will be larger than necessary and only a portion of the chart will be visible on the TV screen. Below the lower limit, the maximum number of stripes will be difficult to resolve on the television screen. Furthermore, the angle between the chief ray of the luminous flux emitted from the surrounding chart and the chart surface is θ
When Zhou
【００１０】0010
【外１】
さらに、被験レンズの性能検査は、通常中心と周辺を見
るのが普通である。従って中心と周辺の代表的な位置（
イメージセンサの約７割の所）の２か所（周辺は周囲４
か所）を最小限検査する。この時中心と周辺のテレビ画
面上のチャートの大きさと解像の状態を同じにした方が
見やすいため、結像レンズの焦点距離は同一にした方が
良い。[Example 1] Furthermore, when testing the performance of a test lens, it is normal to look at the center and periphery. Therefore, the representative positions of the center and periphery (
Approximately 70% of the image sensor)
(locations) shall be inspected to a minimum. At this time, it is easier to see if the charts on the central and peripheral TV screens have the same size and resolution, so it is better to make the focal lengths of the imaging lenses the same.
【００１１】次に、検査者がテレビモニターを見て検査
する時、被験レンズの性能が悪い時チャートが解像せず
にフレアーが多くかかった状態となる。ここで、白黒モ
ニターでも悪い状態は判別できるが、カラーモニターを
用いると、フレアーに色がかかりより精度良く判別する
ことが可能となる。[0011] Next, when the inspector inspects the lens by looking at the television monitor, if the performance of the lens to be tested is poor, the chart will not be resolved and there will be a lot of flare. Here, bad conditions can be determined even with a black and white monitor, but if a color monitor is used, the flare will be colored and it will be possible to determine it more accurately.
【００１２】図１、図２は装置の構成を示す。Ａは被験
用レンズである。１は解像力等試験用チャートで、２は
拡散板、３は光源である。光源３と拡散板２は照明系を
構成する。拡散板２の代りにコンデンサーレンズを設け
てケーラー照明系としても良い。FIGS. 1 and 2 show the configuration of the apparatus. A is a test lens. 1 is a chart for testing resolution, etc., 2 is a diffusion plate, and 3 is a light source. The light source 3 and the diffuser plate 2 constitute an illumination system. A condenser lens may be provided in place of the diffuser plate 2 to provide a Kohler illumination system.
【００１３】４ａは撮像用の結像レンズで、被験レンズ
４の光軸上に当るチャート位置からの逆投影光束を受光
して結像する。４ｂから４ｅは、チャートの軸外（周辺
）位置からの逆投影光束を受光する結像レンズである。
また５ａから５ｅはカラー用固体撮像素子で、順に結像
レンズ４ａから４ｅの像を受像する。６ａから６ｅはテ
レビモニター（テレビ受像器）で、図示しない信号処理
装置を介して順に撮像素子５ａから５ｅに結合されてい
る。尚、結像レンズは同一焦点距離とし、また撮像素子
はすべてチャートから等価な距離に調整して置く。Reference numeral 4a denotes an imaging lens for image pickup, which receives a back-projection light beam from a chart position on the optical axis of the test lens 4 and forms an image. 4b to 4e are imaging lenses that receive backprojected light beams from off-axis (peripheral) positions of the chart. Further, 5a to 5e are color solid-state image sensors, which sequentially receive images from the imaging lenses 4a to 4e. Reference numerals 6a to 6e are television monitors (television receivers), which are sequentially coupled to image sensors 5a to 5e via a signal processing device (not shown). The imaging lenses have the same focal length, and all the imaging elements are adjusted to equivalent distances from the chart.
【００１４】拡散板２を介して光源３からの照明光で照
明されたチャート１からの光束の内、光軸近傍の位置１
ａからの光束は被験レンズＡで収斂作用を受け、更に結
像レンズ４ａにより撮像素子５ａ上に結像される。次い
でその画像はテレビモニター６ａ上に映出され、検査者
に観察される。Of the light flux from the chart 1 illuminated by the illumination light from the light source 3 via the diffuser plate 2, the position 1 near the optical axis
The light flux from a is converged by the test lens A, and is further imaged onto the image sensor 5a by the imaging lens 4a. The image is then displayed on the television monitor 6a and observed by the examiner.
【００１５】また１ｂ等の周辺位置からの光束も夫々結
像レンズ４ｂ等により撮像素子５ｂ等に結像され、テレ
ビモニター４ｂ等の画面上に映出されて検査者に観察さ
れ、先程のテレビモニター６ａ上の画像を含めて検査者
の総合判断に使用される。[0015] Also, the light beams from peripheral positions such as 1b are respectively focused on the image pickup device 5b etc. by the imaging lens 4b etc., and are projected on the screen of the television monitor 4b etc. and observed by the inspector. The image including the image on the monitor 6a is used for the inspector's comprehensive judgment.
【００１６】図３に別の実施例で、テレビカメラもしく
はテレビモニターを多数配置することで場所を取る点を
改善したものである。FIG. 3 shows another embodiment in which the space taken up is improved by arranging a large number of television cameras or television monitors.
【００１７】図中、図１と同等の機能を持つものには同
一の番号を付すものとし、新たに付加された部材７は被
験レンズＡを光軸を中心に間欠的もしくは連続的な回転
が可能である様に支持する冶具である。In the figure, parts having the same functions as those in FIG. It is a jig that supports it as much as possible.
【００１８】８ａと８ｂは光路折曲げ用のミラーで、軸
上検査光束を、光軸延長上から偏位した位置に配された
結像レンズ４ａへ誘導する。９ａと９ｂも光路折曲げ用
ミラーで、殊にミラー９ａは軸外の逆投影光束を受ける
のに適した角度に設定されている。ミラー９ａと９ｂを
順次反射した光束は結像レンズ４ｂへ入射する。本例の
場合、周辺位置の１ヶ所について投影チャート像を観察
できるだけであるが、被験レンズＡを回転させることで
、例えば撮像画面の四隅について順次検査が可能である
。Mirrors 8a and 8b are for bending the optical path, and guide the axial inspection light beam to the imaging lens 4a arranged at a position offset from the extension of the optical axis. Mirrors 9a and 9b are also optical path bending mirrors, and mirror 9a in particular is set at an angle suitable for receiving an off-axis backprojection beam. The light beams sequentially reflected by the mirrors 9a and 9b enter the imaging lens 4b. In this example, the projected chart image can only be observed at one peripheral position, but by rotating the test lens A, it is possible to sequentially inspect, for example, the four corners of the imaging screen.
【００１９】尚、被験レンズＡを回転させる代りにミラ
ー９ａと９ｂからなるユニットを回転させても良く、そ
の場合、結像レンズ４ｂの光軸は被験レンズＡの光軸延
長上に配置するものとする。Note that instead of rotating the test lens A, a unit consisting of mirrors 9a and 9b may be rotated, and in that case, the optical axis of the imaging lens 4b is placed on the extension of the optical axis of the test lens A. shall be.
【００２０】図４は更なる別の実施例で、被験レンズＢ
が可変焦点レンズの場合に対処するためのものである。FIG. 4 shows yet another example, in which the test lens B
This is to deal with the case of a variable focus lens.
【００２１】図示は省いたが、結像レンズ４ｂから４ｄ
と撮像素子５ｂから５ｄを順に組合わせた鏡筒を放射方
向の両頭矢印ＥＰ１０ｂから１０ｄに添って同時に且つ
同量だけ移動させる機構により、チャートの周辺へ指向
する角度θを変更するものである。Although not shown, the imaging lenses 4b to 4d
The angle θ toward the periphery of the chart is changed by a mechanism that moves a lens barrel in which image sensors 5b to 5d are combined in sequence simultaneously and by the same amount along double-headed arrows EP10b to 10d in the radial direction.
【００２２】又、これも図示しないが、被験レンズＢの
変動操作に連動して角度θを変える機構を追加すると操
作は更に便利になる。尚、結像レンズの焦点距離も前述
の式を充たす様に変倍すると良い。図５は、図３の形式
を代りた図４の変形例を示す。Although not shown in the drawings, the operation becomes even more convenient if a mechanism for changing the angle θ in conjunction with the varying operation of the lens B under test is added. Incidentally, it is preferable that the focal length of the imaging lens is also varied in magnification so as to satisfy the above-mentioned formula. FIG. 5 shows a modification of FIG. 4 in which the format of FIG. 3 is replaced.
【００２３】図３の構成に加えて揺動ミラー９ｃが配置
され、このミラー９ｃは被験レンズＢをテレ端にセット
したときの逆投影光を受けるに適した位置に設けるもの
とし、使用時に破線位置に係止し、不使用時に実線位置
に退却させるものとする。In addition to the configuration shown in FIG. 3, a swinging mirror 9c is arranged, and this mirror 9c is placed at a position suitable for receiving the back projection light when the test lens B is set at the telephoto end. It shall be locked in position and retracted to the solid line position when not in use.
【００２４】また第１のミラー９ａは被験レンズＢをワ
イド端にセットしたときの逆投影光を受けるに適した位
置に設けるものとする。It is also assumed that the first mirror 9a is provided at a position suitable for receiving the back projection light when the lens B to be tested is set at the wide end.
【００２５】検査時は被験レンズＢまたはユニット１０
を回転させるものとする。[0025] At the time of inspection, test lens B or unit 10
shall be rotated.
【００２６】尚、揺動ミラーの数を増せば多くの画角で
検査が可能となる。[0026] If the number of swinging mirrors is increased, inspection can be performed at many angles of view.
【００２７】以上実施例に述べた通り、被験レンズの周
辺の性能を検査する時、代表１周辺の周囲４か所それぞ
れに結像レンズと撮像素子を持ち、中心と合わせて５か
所を同時に検査する方式がある。この場合、５台のテレ
ビモニターを見易い位置にまとめれば良い。また、五つ
の結像レンズが干渉しないようにある程度被験レンズか
ら離して配置する。As described in the examples above, when inspecting the peripheral performance of a test lens, an imaging lens and an image sensor are provided at each of four locations around the periphery of representative 1, and five locations including the center are simultaneously inspected. There is a method of inspection. In this case, it is sufficient to arrange the five television monitors in an easily viewable position. In addition, the five imaging lenses are placed at a certain distance from the test lens to prevent interference.
【００２８】次に、周辺の周囲４か所をそれぞれ持たず
に、１か所だけにして被験レンズの方を回転するように
して検査する方法もある。つまり、中心と周辺の２台の
みのテレビモニターでよいが周辺は少しずつ時間をずら
して順番に見れば良い。別の方法として、周辺の検査を
被験レンズと結像レンズの間にミラーを２ヶ所用いこの
ミラーを回転させることにより周辺の周囲の性能を検査
する。[0028] Next, there is also a method in which the lens to be tested is inspected by rotating the test lens by using only one location instead of each of the four locations around the periphery. In other words, you only need to use two TV monitors, one in the center and one on the periphery, but you can watch the periphery in turn at slightly different times. Another method is to inspect the peripheral performance by using two mirrors between the test lens and the imaging lens and rotating the mirrors.
【００２９】さらに、被験レンズがズームレンズの時は
、結像レンズも上式を満足するような焦点距離範囲のズ
ームレンズする。次に、検査する焦点距離の数だけ上記
ミラーの組み合わせを用意して、ある焦点距離とミラー
の組み合わせを保ってそれぞれにおいてミラーを回転し
て周辺の周囲の性能を検査すれば良い。Furthermore, when the lens to be tested is a zoom lens, the imaging lens is also a zoom lens with a focal length range that satisfies the above equation. Next, it is sufficient to prepare as many combinations of mirrors as the number of focal lengths to be inspected, maintain a certain focal length and mirror combination, rotate the mirrors for each, and inspect the performance of the surrounding area.
【００３０】[0030]
【発明の効果】この様な装置を用いることにより、まず
通常の明るい部屋にこの装置を設置する事が出来る。ま
た、被験レンズの焦点距離に関係なく被験レンズとテレ
ビモニターを検査者の近傍に配置することが出来る。従
って、従来暗室でしか出来なかった検査を通常の明るい
部屋で出来る様になり検査者の目に負担がかからなくな
る。さらに、被験レンズの焦点距離に関係なく検査者は
一人で可能となる。[Effects of the Invention] By using such a device, it is possible to install the device in a normal bright room. Furthermore, the test lens and the television monitor can be placed near the examiner regardless of the focal length of the test lens. Therefore, inspections that could conventionally only be done in a dark room can now be done in a normal bright room, and there is no strain on the eyes of the inspector. Furthermore, the test can be performed by one person regardless of the focal length of the lens to be tested.
【図１】第１の実施例の光学断面図。FIG. 1 is an optical cross-sectional view of a first embodiment.
【図２】第１の実施例の斜視図。FIG. 2 is a perspective view of the first embodiment.
【図３】第２実施例の光学断面図。FIG. 3 is an optical cross-sectional view of the second embodiment.
【図４】第３実施例の斜視図。FIG. 4 is a perspective view of the third embodiment.
【図５】第４実施例の光学断面図。FIG. 5 is an optical cross-sectional view of the fourth embodiment.
Ａ・Ｂ 被験レンズ １ チャート ４ａ〜４ｅ 結像レンズ ５ａ〜５ｅ 固体撮像素子 ６ａ〜６ｅ テレビモニター A/B Test lens 1 Chart 4a-4e Imaging lens 5a-5e Solid-state image sensor 6a-6e TV monitor
Claims (6)
のチャートと、チャートを照明する照明手段と、被験レ
ンズを通してチャートの軸上位置を撮像するためのテレ
ビ撮像手段と、このテレビ撮像手段の光路に対して傾斜
した光路を持ちチャートの軸外位置を撮像するためのテ
レビ撮像手段と、夫々のテレビ撮像手段の出力映像を観
察するためテレビモニターを具えたことを特徴とするレ
ンズ検査装置。1. A test chart disposed on the image plane side of a test lens, an illumination means for illuminating the chart, a television imaging means for imaging the axial position of the chart through the test lens, and the television imaging system. Lens inspection characterized by comprising: a television imaging means having an optical path inclined with respect to the optical path of the means and for imaging an off-axis position of the chart; and a television monitor for observing the output image of each television imaging means. Device.
テレビ撮像手段の光路はチャートの軸上位置を撮像する
ためのテレビ撮像手段の光路に対し傾角を変更し得るこ
とを特徴とする請求項１のレンズ検査装置。2. A claim characterized in that the optical path of the television imaging means for imaging the off-axis position of the chart can change the inclination angle with respect to the optical path of the television imaging means for imaging the on-axis position of the chart. 1 lens inspection device.
であることを特徴とする請求項１のレンズ検査装置。3. The lens inspection apparatus according to claim 1, wherein each television imaging means is for color imaging.
、これを照明して逆投影した光束を結像レンズを用いて
結像させ、この結像面に撮像素子を配し、この撮像素子
上のチャート像をテレビモニターで観察する装置であっ
て、逆投影した光束の結像位置は無限遠から２０ｆ（ｆ
：被験レンズの焦点距離）の間にあり、チャート上の検
査するための縞の最大本数（１ｍｍ当たり、黒白で１本
に数える）をＮとし、撮像素子の１ｍｍ当たりの画素数
をＭとし、結像レンズの焦点距離をＦとした時、３（２
Ｎ／Ｍ）＞Ｆ／ｆ＞０．９（２Ｎ／Ｍ）の関係を満たし
、被験レンズの光軸中心のチャートに対する結像レンズ
と周辺のチャートに対する結像レンズを少なくとも備え
、被験レンズの光学性能を検査することを特徴とするレ
ンズ検査装置。4. A chart is placed on the image plane side of the test lens, the chart is illuminated and the back-projected light beam is formed into an image using an imaging lens, an image sensor is placed on this image formation plane, and the image is captured. This is a device for observing the chart image on the element on a TV monitor, and the imaging position of the back-projected light beam is from infinity to 20f (f
:focal length of the test lens), the maximum number of stripes to be inspected on the chart (black and white are counted as 1 per 1 mm) is N, the number of pixels per 1 mm of the image sensor is M, When the focal length of the imaging lens is F, 3(2
It satisfies the relationship of A lens inspection device characterized by inspecting performance.
ズの焦点距離と周辺のチャートに対する結像レンズの焦
点距離は同一であることを特徴とする請求項４のレンズ
検査装置。5. The lens inspection apparatus according to claim 4, wherein the focal length of the imaging lens with respect to the chart at the center of the optical axis and the focal length of the imaging lens with respect to the peripheral charts are the same.
応のものを用いることを特徴とする請求項４のレンズ検
査装置。6. The lens inspection apparatus according to claim 4, wherein the image pickup device and the television monitor are color compatible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7510991A JP2899127B2 (en) | 1991-04-08 | 1991-04-08 | Lens inspection apparatus and lens manufacturing method using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7510991A JP2899127B2 (en) | 1991-04-08 | 1991-04-08 | Lens inspection apparatus and lens manufacturing method using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04309834A true JPH04309834A (en) | 1992-11-02 |
| JP2899127B2 JP2899127B2 (en) | 1999-06-02 |
Family
ID=13566682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7510991A Expired - Fee Related JP2899127B2 (en) | 1991-04-08 | 1991-04-08 | Lens inspection apparatus and lens manufacturing method using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2899127B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5801822A (en) * | 1997-02-06 | 1998-09-01 | Pbh, Inc. | Ophthalmic lens inspection system |
| US5818573A (en) * | 1997-02-06 | 1998-10-06 | Pbh, Inc. | Opthalmic lens inspection system |
| KR100803461B1 (en) * | 2006-10-20 | 2008-02-19 | (주)디지탈옵틱 | Image forming hens, and testing and controlling device for module of the image forming lens |
| JP2012053389A (en) * | 2010-09-03 | 2012-03-15 | Fujifilm Corp | Front desk converter, and zoom lens inspection method and device using the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009041968A (en) * | 2007-08-07 | 2009-02-26 | Fujinon Corp | Method and device for evaluating lens on premise of restoration processing, and correction optical system for evaluation |
-
1991
- 1991-04-08 JP JP7510991A patent/JP2899127B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5801822A (en) * | 1997-02-06 | 1998-09-01 | Pbh, Inc. | Ophthalmic lens inspection system |
| US5818573A (en) * | 1997-02-06 | 1998-10-06 | Pbh, Inc. | Opthalmic lens inspection system |
| KR100803461B1 (en) * | 2006-10-20 | 2008-02-19 | (주)디지탈옵틱 | Image forming hens, and testing and controlling device for module of the image forming lens |
| JP2012053389A (en) * | 2010-09-03 | 2012-03-15 | Fujifilm Corp | Front desk converter, and zoom lens inspection method and device using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2899127B2 (en) | 1999-06-02 |
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