JPH04141901A - Lens for variable light distribution type lighting device - Google Patents
Lens for variable light distribution type lighting deviceInfo
- Publication number
- JPH04141901A JPH04141901A JP2263460A JP26346090A JPH04141901A JP H04141901 A JPH04141901 A JP H04141901A JP 2263460 A JP2263460 A JP 2263460A JP 26346090 A JP26346090 A JP 26346090A JP H04141901 A JPH04141901 A JP H04141901A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- light distribution
- steps
- optical axis
- lenses
- 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
- 238000009826 distribution Methods 0.000 title claims abstract description 27
- 230000003287 optical effect Effects 0.000 claims abstract description 21
- 238000005286 illumination Methods 0.000 claims description 10
- 239000006185 dispersion Substances 0.000 claims description 2
- 238000013459 approach Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- 230000004907 flux Effects 0.000 description 9
- 238000009792 diffusion process Methods 0.000 description 7
- 230000004075 alteration Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000004313 glare Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Mechanical Light Control Or Optical Switches (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、バルブの光軸上に一２枚のレンズを配置し、
該両レンズの相対距離を可変して照射光束を拡散又は収
束させる機能を備えた配光可変型照明装置用レンズに関
するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for disposing twelve lenses on the optical axis of a bulb,
The present invention relates to a variable light distribution type lighting device lens having a function of varying the relative distance between the two lenses to diffuse or converge the irradiated light flux.
従来より自動車の前照灯において、第６図（ａ）及びＣ
ｂ）に示すように、放物反射鏡面の前方又はプロジェク
タランプの前方光軸上に、同一ピッチのシリンＹリカル
ステップ６２．６３を多数設けた２枚のレン・ズ６．０
．６１を正対させ、それらの間隔を調整することにより
左右方向の照射、範囲を段階的或は車速等に連動して可
変とする照明装置が使用されている。Conventionally, in automobile headlights, Fig. 6(a) and C
As shown in b), two lenses 6.0 are provided with a large number of cylindrical Y linear steps 62 and 63 of the same pitch in front of the parabolic reflecting mirror surface or on the front optical axis of the projector lamp.
．． An illumination device is used in which the illumination device 61 is faced directly and the distance between them is adjusted so that the illumination and range in the left and right direction can be varied in stages or in conjunction with the vehicle speed or the like.
しかし、この種の上記構成の照明装置°は、（ａ）２枚
のレンズ６０．６１で光束の向きを制御するため、その
色収差は１枚のレンズのときに比べて大きくなる。However, in this type of illumination device with the above configuration, (a) the direction of the light flux is controlled by two lenses 60 and 61, and therefore the chromatic aberration is larger than when using one lens.
（ｂ） レンズの周辺に入射する光束は、２枚のレン
ズ６０．６１により光束の向きを大きく変向されるため
、特に色収差が大きく成ることがら、第６図に示すよう
に、全体の光束のうち、特に側方周辺部（矢印Ａ、 Ｂ
）に向かう光束にレンズの色収差による色ムラが発生し
、
（１） 狭拡散時（矢印Ａ）には周辺部はやや赤みが
かった照射光色に成る。(b) The direction of the luminous flux incident on the periphery of the lens is largely changed by the two lenses 60 and 61, and as a result, the chromatic aberration becomes particularly large. Especially the lateral peripheral areas (arrows A, B
) Due to chromatic aberration of the lens, color unevenness occurs in the light beam heading toward (1) During narrow diffusion (arrow A), the irradiated light color becomes slightly reddish at the periphery.
（２）広拡散時（矢印Ｂ）には周辺部はやや青みがかっ
た照射光色に成るため、上記周辺の光束が路面或はガー
ドレールに照射された場合、生理的に不快感を覚えると
いう問題を有していた。(2) During wide diffusion (arrow B), the irradiated light color is slightly bluish in the peripheral area, so if the light flux in the periphery is irradiated onto a road surface or a guardrail, this problem can be caused by physiological discomfort. had.
また、２枚のレンズ６０．６１のシリンドリカルレンズ
ステップの形状を各レンズ内で焦点距離と共に同一に構
成した場合、平坦な配光が形成されるため、側方に向か
う照度も高く、特に広拡数にした場合に路肩やガードレ
ール等が明るく輝きすぎて前方の視認性が損なわれると
いう問題があうた。In addition, if the shape of the cylindrical lens step of the two lenses 60 and 61 is configured to be the same as well as the focal length within each lens, a flat light distribution will be formed, so the illuminance toward the sides will be high, especially at wide magnification. In terms of numbers, the problem arises that road shoulders and guardrails shine too brightly, impairing visibility ahead.
更に、両レンズ６０．６１の間隔に関係なく照射パター
ンの左右方向の照明範囲が明確に区画され、この照明範
囲を越えると急激に暗く成るため自動車の運転に不安を
覚え、ることがある等の問題もあった。Furthermore, regardless of the distance between the lenses 60 and 61, the illumination range in the left and right directions of the irradiation pattern is clearly defined, and beyond this illumination range, it suddenly becomes dark, which may make driving a car uneasy. There was also a problem.
本発明は、上記問題に鑑みて創案されたものであり、レ
ンズの色収差による照射光束の色ムラを解消し、且つ光
照射域と非照射域の境界のコントラストを小さくした配
光可変型照明装置用レンズを提供することを目的とする
ものである。The present invention was devised in view of the above problems, and is a variable light distribution lighting device that eliminates the color unevenness of the irradiated light flux due to the chromatic aberration of the lens and reduces the contrast between the boundary between the light irradiation area and the non-irradiation area. The purpose is to provide lenses for
上記目的を達成するために、本発明に係る配光可変型照
明装置用レンズは、光軸と略平行な光束を照射する平行
光束照射手段の前方光軸上にシリンドリカルレンズステ
ップを同一ピッチで構成した２枚のレンズを配置し、該
両レンズの間隔を調整することにより、左右方向へのビ
ーム拡散範囲を制御できるようにした照明装置において
、前記レンズの一方或は両方のレンズについて、該各シ
リンドリカルレンズステップの焦点距離を徐変或は段階
的に変更したことを要旨とするものである。In order to achieve the above object, the variable light distribution type lighting device lens according to the present invention includes cylindrical lens steps arranged at the same pitch on the front optical axis of the parallel light beam irradiation means that irradiates the light beam substantially parallel to the optical axis. In the illumination device, the beam dispersion range in the left and right direction can be controlled by arranging two lenses and adjusting the distance between the two lenses. The gist is that the focal length of the cylindrical lens step is changed gradually or in stages.
上記構成によれば、光軸上に設けた外側レンズと内側レ
ンズに構成してなる隣設したシリンドリカルレンズステ
ップの焦点距離が変えであるため、レンズの透過光束が
互いに重なり合い、レンズの色収差による色ムラが目立
たなくなって、視認制御を改善することができる。According to the above configuration, since the focal lengths of the adjacent cylindrical lens steps made up of an outer lens and an inner lens provided on the optical axis are different, the transmitted light beams of the lenses overlap each other, resulting in color distortion due to chromatic aberration of the lenses. The unevenness becomes less noticeable and visibility control can be improved.
また、本発明によれば、照射光束のパターンのうち光軸
近傍部が常時最大照度となるため、遠方視認性が優れ、
また側方に至るに従い光束の照度を適正に設計制御する
ことができるため、眩光を抑制して良好な視認性を得る
ことができる。Further, according to the present invention, the portion near the optical axis of the pattern of the irradiated light beam always has the maximum illuminance, so long-distance visibility is excellent.
Furthermore, since the illuminance of the luminous flux can be appropriately designed and controlled as it approaches the sides, glare can be suppressed and good visibility can be obtained.
以下、本発明に係る配光可変型照明装置用レンズの実施
例を図面に従って説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the variable light distribution type lighting device lens according to the present invention will be described below with reference to the drawings.
第１図及び第２図は、第一の実施例を示すものであり、
光軸り上に配置した外側レンズ１の各シリンドリカル凸
レンズステップｌｌａ、ｌｌｂ・・・は、それぞれ同一
焦点距離を有し同一断面形状となるように構成すると共
に、内側レンズ２の各シリンドリカル凸レンズステップ
２１ａ、２１ｂ・・・は、中央から周辺に向かうに従い
、その焦点距離ｆｌ、ｆ２．ｆ３を長くなるように徐変
（ｆｌくｆ２＜ｆ３）した構造に成る。1 and 2 show a first embodiment,
The cylindrical convex lens steps lla, llb, . , 21b... have focal lengths fl, f2 . . . from the center to the periphery. It has a structure in which f3 is gradually changed to become longer (fl×f2<f3).
第２図に示すように上記両レンズ１．２の構成の場合の
スクリーン上の配光は、各レンズステップを透過した光
束により中心側から、２１ａと１１ａによる配光部Ｐ１
．２１ｂとＩｌｂによる配光部Ｐ２、及び２１ｃとｌｌ
ｃによる配光部Ｐ３とから成る全体の配光が形成される
。従って、照射光束の各部の配光ＰＩ、Ｐ２．Ｐ３が他
の配光と重ね合わされるため、該各配光ＰＩ、Ｐ２．Ｐ
３の色ムラの量が少なくなると共に、２枚の同一形状の
レンズステップの場合と比較して色ムラが大幅に低減さ
れる。As shown in FIG. 2, the light distribution on the screen in the case of the configuration of both lenses 1.2 is from the center side by the light flux transmitted through each lens step, to the light distribution section P1 formed by 21a and 11a.
．． Light distribution part P2 by 21b and Ilb, and 21c and ll
The entire light distribution is formed by the light distribution portion P3 by c. Therefore, the light distribution PI of each part of the irradiation light flux, P2. Since P3 is superimposed with other light distributions, each light distribution PI, P2 . P
In addition to reducing the amount of color unevenness in lens step No. 3, the color unevenness is also significantly reduced compared to the case of two lens steps having the same shape.
第３図及び第４図は、本発明の第二の実施例を示すもの
であり、外側レンズ１のシリンドリカルレンズステップ
は凹レンズステップによって構成しである。3 and 4 show a second embodiment of the present invention, in which the cylindrical lens step of the outer lens 1 is constituted by a concave lens step.
光軸り上に配置した外側レンズ１の各シリンドリカル凹
レンズステップは、光軸りに近い中央部のＡゾーンのス
テップ１２ａ、１２ａ・・・と、光軸りと離れたＡゾー
ンの両外側に位置するＢゾーンのステップ１２ｂ、１２
ｂ・・・の２種類から成り、両ゾーンのシリンドリカル
凹レンズステップ１２ａ、１２ｂの焦点距離ｆａ、ｆｂ
は、ＡゾーンのものがＢゾーンのものより短＜ （ｆ
ａ＜ｆｂ）なるように構成しである。また、内側レンズ
２のレンズステ７ブは凸レンズステップによって構成し
てあり、上記外側レンズ１の各レンズステップと対応す
るように、ＡゾーンとＢゾーンに区画されている。そし
てＡゾーンのステップ２２ａ、２２ａ・・・と、光軸り
と離れたＡゾーンの両外側に位置するＢゾーンのステッ
プ２２ｂ、２２ｂ・・・は、その焦点距離が、Ａゾーン
のものがＢゾーンのものより短い（ｆａ＜ｆｂ）構造に
成っている。Each cylindrical concave lens step of the outer lens 1 arranged on the optical axis is located at the center A zone steps 12a, 12a, etc. near the optical axis, and on both outsides of the A zone away from the optical axis. Steps 12b and 12 of zone B
Consisting of two types b..., the focal lengths fa and fb of the cylindrical concave lens steps 12a and 12b in both zones.
is shorter than that in zone A < (f
a<fb). Further, the lens step 7 of the inner lens 2 is constituted by a convex lens step, and is divided into an A zone and a B zone so as to correspond to each lens step of the outer lens 1. The steps 22a, 22a... in the A zone and the steps 22b, 22b... in the B zone, which are located on both sides of the A zone away from the optical axis, have focal lengths that are It has a shorter structure (fa<fb) than that of the zone.
上記両レンズ１．２の構成の場合、第４図に示すように
スクリーン上の配光は、各レンズステップを透過した光
束の拡散角度がＡゾーンのものとＢゾーンのものとで異
なるため、２つのゾーンＰａ、Ｐｂの配光が重ね合わさ
れるように成り、該配光の色ムラの量が少なく成ると共
に、２枚の同一形状のレンズステップの場合と比較して
前記第一の実施例と同様に色ムラが大幅に低減される。In the case of the above-mentioned configuration of both lenses 1.2, as shown in FIG. 4, the light distribution on the screen is such that the diffusion angle of the light beam transmitted through each lens step is different between the A zone and the B zone. The light distributions of the two zones Pa and Pb are superimposed, and the amount of color unevenness in the light distribution is reduced, compared to the case of two lens steps of the same shape, as in the first embodiment. Similarly, color unevenness is significantly reduced.
尚、前記第−及び第二の実施例を示す第１図と第３図は
狭拡散のレンズ位置を示しており、広拡散を得るために
は、第一の実施例では両レンズ１゜２０間隔を狭小し、
また第二の実施例の場合は両レンズ１，２の間隔を拡張
する。但し、第二の実施例の場合は、焦点距離のとりか
た及び各ゾーンの分割の状態によって、両しンズ１．２
間隔の相対変位のなかで、その途中で最大照度が得られ
る（照射光束が収束する）場合がある。また、−船釣に
は第二の実施例においても外側レンズ１のシリンドリカ
ルレンズステップを凸のシリンドリカルレンズによって
構成し、両レンズ１．２を離間させた状態で狭拡散、両
レンズ１．２を近接させた状態で広拡散の照射光束を得
るように構成することが好ましい。Note that FIGS. 1 and 3, which show the above-mentioned embodiments 1 and 2, show the lens positions for narrow diffusion, and in order to obtain wide diffusion, both lenses in the first embodiment are narrow the gap,
In the case of the second embodiment, the distance between both lenses 1 and 2 is expanded. However, in the case of the second embodiment, depending on the focal length and the division of each zone, both lenses are 1.2
Among the relative displacements of the intervals, the maximum illumination intensity may be obtained (the irradiation light flux converges) in the middle. - For boat fishing, also in the second embodiment, the cylindrical lens step of the outer lens 1 is configured with a convex cylindrical lens, and with both lenses 1.2 separated, narrow diffusion is achieved. It is preferable to configure such a configuration that a widely diffused irradiation light beam is obtained in a state in which they are brought close to each other.
次に、第５図は、前記実施例の外側レンズ１に対して内
側レンズ２を光軸り方向に相対移動するためのレンズ駆
動装置の一実施例を示すものである。Next, FIG. 5 shows an embodiment of a lens driving device for moving the inner lens 2 relative to the outer lens 1 of the above embodiment in the direction along the optical axis.
ケーシング３１の前面に形成した矩形開口部に外側レン
ズ１を構成した前面レンズ３３の脚部を嵌着締結すると
共に、該ケーシング３１の開口部内面を上記外側レンズ
１の脚部形状と路間−の矩形を為す筒状体から成る第二
フレーム３４を固設してなる。また、該第二フレーム３
４には光軸り方向摺動自在に筒状の第一フレーム３５を
内挿すると共に、該第−フレーム３５に内側レンズ２を
固設しである。上記内側レンズ２と外側レンズ１にはそ
れぞれ前記第−又は第二の実施例で説明したように、シ
リンドリカルな凸又は凹レンズステップ１１．２１を等
ピンチで横列に並設してなる。The legs of the front lens 33 forming the outer lens 1 are fitted and fastened into the rectangular opening formed on the front surface of the casing 31, and the inner surface of the opening of the casing 31 is formed between the leg shape of the outer lens 1 and the path. A second frame 34 made of a rectangular cylindrical body is fixedly installed. In addition, the second frame 3
A cylindrical first frame 35 is inserted into the frame 4 so as to be slidable in the direction of the optical axis, and the inner lens 2 is fixed to the second frame 35. The inner lens 2 and the outer lens 1 each have cylindrical convex or concave lens steps 11, 21 arranged in parallel rows with equal pinch, as explained in the first or second embodiment.
３７は、内側レンズ２の光軸上後方に形成したりフレフ
タであり、該リフレクタ３７の放物反射鏡面３８の焦点
に点灯用のバルブ３９のフィラメントが位置するように
、ケーシング３１の後端にはバルブソケット４０が固設
しである。また４１は、前記第一フレーム３５の後端に
光軸りと平行に突設したレンズ駆動バイブであり、該レ
ンズ駆動バイブ４１の端部に固設したナツト４２に対し
てケーシング３１に回動自在に軸設した螺子軸４３を螺
合すると共に、該螺子軸４３に軸着したウオームビニオ
ン４４と回動伝達減速機構のウオーム４５を噛合し、更
に該ウオーム４５に軸着した平ギヤ４６を制御モータ４
７の駆動軸に軸着したピニオンギヤ４８と噛合した構造
に成っている。また、４９は入力軸５０に軸着した平ギ
ヤ５工を前記ウオーム４５に軸着したピニオンギヤ５２
と噛合して鏡検転角を検出するポテンショメータである
。37 is a reflector formed at the rear of the inner lens 2 on the optical axis, and is provided at the rear end of the casing 31 so that the filament of the lighting bulb 39 is located at the focal point of the parabolic mirror surface 38 of the reflector 37. The valve socket 40 is fixedly installed. Reference numeral 41 denotes a lens drive vibrator that is protruded from the rear end of the first frame 35 parallel to the optical axis, and is rotated by the casing 31 with respect to a nut 42 that is fixed to the end of the lens drive vibe 41. A freely disposed screw shaft 43 is screwed into the screw shaft 43, a worm pinion 44 which is rotatably mounted on the screw shaft 43 is engaged with a worm 45 of the rotation transmission reduction mechanism, and a spur gear 46 is further rotatably mounted on the worm 45. control motor 4
It has a structure in which it meshes with a pinion gear 48 that is pivotally attached to the drive shaft of No. 7. Further, reference numeral 49 denotes a pinion gear 52 which has a spur gear 5 which is pivoted to the input shaft 50 and a pinion gear 52 which is pivoted to the worm 45.
This is a potentiometer that meshes with the mirror to detect the mirror rotation angle.
上記制御モータ４７を正転又は逆転駆動すると、回動伝
達減速機構を介して螺子軸４３を所定の速度で回動し、
該螺子軸４３と螺合しているナツト４２との螺合作用に
よってレンズ駆動バイブ４１を矢印Ｘ方向に変位する。When the control motor 47 is driven forward or reverse, the screw shaft 43 is rotated at a predetermined speed via the rotation transmission reduction mechanism.
The lens driving vibe 41 is displaced in the direction of arrow X by the screwing action of the screw shaft 43 and the nut 42 screwed together.
この変位により第一フレーム３５は、第二フレーム３４
の内面を光軸り方向に滑動し、内側レンズ２は外側レン
ズ１に対してシリントリ：カルレンズステップ１１．２
１相互のピッチ方向の相対位置を−変えることなく正確
に変位し、両レンズ１．２間の相対距離を変更すること
ができる。そして、この相対距離はポテンショメータ４
９により検出され、上記両レンズ２゜６の相対距離とポ
テンショメータ４９の関係を予め設定することにより、
該ポテンショメータ１７からの位Ｗ信号をもって制御モ
ータ４７を中央制御回路（図示せず）によって制御駆動
することができ、照射光束の拡散幅を切り替えることが
できる。Due to this displacement, the first frame 35 is moved to the second frame 34.
The inner lens 2 slides along the optical axis on the inner surface of the outer lens 1.
It is possible to accurately displace the lenses 1 and 1 without changing their relative positions in the pitch direction, and change the relative distance between the lenses 1 and 2. And this relative distance is determined by potentiometer 4
9, and by setting the relationship between the relative distance between the two lenses 2°6 and the potentiometer 49 in advance,
The control motor 47 can be controlled and driven by a central control circuit (not shown) using the W signal from the potentiometer 17, and the diffusion width of the irradiated light beam can be switched.
本発明に係る配光可変型照明装置用レンズは、以上のよ
うに構成したから、光軸上に設けた外側１／ンズと内側
レンズに構成して成る隣設したシリンドリカルレンズス
テップの焦点距離を変えることにより、レンズの透過光
束が互いに重なり合うように成るため、レンズの色収差
による色ムラが目立たなく成る。Since the lens for a variable light distribution lighting device according to the present invention is configured as described above, the focal length of the adjacent cylindrical lens step composed of the outer 1/lens and the inner lens provided on the optical axis can be adjusted. By changing this, the light beams transmitted through the lens overlap each other, so that color unevenness caused by chromatic aberration of the lens becomes less noticeable.
また、本発明によれば、照射光束のパターンのうち光軸
近傍部が常時最大照度となるため、遠方視認性が優れ、
また側方に至るに従い光束の照度を適正に設計制御する
ことができるため、ガードレール及び路肩が必要以上の
輝光することがなく、眩光を抑制して良好な視ｍ性を得
ることができる等の特徴を有するものであり、本発明実
施による効果は極めて大きい。Further, according to the present invention, the portion near the optical axis of the pattern of the irradiated light beam always has the maximum illuminance, so long-distance visibility is excellent.
In addition, since the illuminance of the light beam can be appropriately designed and controlled as it approaches the sides, guardrails and road shoulders will not be illuminated more than necessary, and it will be possible to suppress glare and obtain good visibility. Therefore, the effects of implementing the present invention are extremely large.
第１図は本発明に係る配光可変型照明装置用レンズの第
一の実施例を示すレンズ系の説明図、第２図は同レンズ
系による照射パターンの説明図、
第３図は本発明の第二の実施例を示すレンズ系の説明図
、
第４図は同レンズ系Ｃよる照射バタ・−ンの説明図、
第５図は本発明に係るレンズ系の駆動機構の一実施例を
示すものであり、
（ａ）は一部切欠した側断面図、
（ｂ）は同平断面図、
（Ｃ１は背面図、
第６図は従来のレンズ系を示すものであり、ｌａ）は狭
拡歓待の説明図、
山）は広拡歓待の説明図、
第７図は同レンズ系Ｅよる照射パターンを示す説明図で
ある。
１・・・夕（側１／ンズ ２・・・内側レンズ１
１、 １１ ａ、 １ ｌ ｂ
・・・シリンドリカル凸レンズステップ２１．２１ａ、
２１ｂ
・・・シリンドリカル凸レンズステップ３４・・・第二
フレーム ３５・・・第一フレーム３７・・・リフレ
クタ ３８・・・放物反射鏡面３９・・・点灯バル
ブ ４１・・・レンズ駆動バイブ４２・・・ナツト
４３・・・螺子軸４４・・・ウォ・−ムビニ
オン
４５・・・ウオーム ４７・・・制御モータ４９
・・・ポテンショメータ
特許出願人 株式会社小糸製作所
代理人 弁理士 前 １） 和 男第
図
（ｂ）
第
図
■Fig. 1 is an explanatory diagram of a lens system showing a first embodiment of a lens for a variable light distribution illumination device according to the present invention, Fig. 2 is an explanatory diagram of an irradiation pattern by the same lens system, and Fig. 3 is an explanatory diagram of the present invention. FIG. 4 is an explanatory diagram of a lens system showing a second embodiment of the invention. FIG. 4 is an explanatory diagram of the irradiation butter by the lens system C. FIG. (a) is a partially cutaway side sectional view, (b) is a planar sectional view, (C1 is a rear view, Figure 6 shows a conventional lens system, and la) is a narrow cross-sectional view. An explanatory diagram of expanded hospitality, crest) is an explanatory diagram of expanded hospitality, and FIG. 7 is an explanatory diagram showing the irradiation pattern by the same lens system E. 1...Evening (side 1/lens 2...inner lens 1)
1, 11 a, 1 l b...Cylindrical convex lens step 21.21a,
21b... Cylindrical convex lens step 34... Second frame 35... First frame 37... Reflector 38... Parabolic reflecting mirror surface 39... Lighting bulb 41... Lens drive vibe 42...・Nut 43...Screw shaft 44...Warm binion 45...Worm 47...Control motor 49
... Potentiometer patent applicant Koito Seisakusho Co., Ltd. Representative Patent attorney 1) Kazuo Diagram (b) Diagram ■
Claims (1)
方光軸上にシリンドリカルレンズステップを同一ピッチ
で構成した２枚のレンズを配置し、該両レンズの間隔を
調整することにより、左右方向へのビーム拡散範囲を制
御できるようにした照明装置において、 前記レンズの一方或は両方のレンズについて、該各シリ
ンドリカルレンズステップの焦点距離を徐変或は段階的
に変更し得るように構成したことを特徴とする 配光可変型照明装置用レンズ。[Claims] Two lenses each having cylindrical lens steps arranged at the same pitch are arranged on the front optical axis of a parallel light beam irradiation means that irradiates a light beam substantially parallel to the optical axis, and the distance between the two lenses is adjusted. In this lighting device, the beam dispersion range in the left and right directions can be controlled, and the focal length of each cylindrical lens step is changed gradually or stepwise for one or both of the lenses. 1. A lens for a variable light distribution lighting device, characterized in that the lens is configured to obtain a variable light distribution type illumination device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2263460A JP2541869B2 (en) | 1990-10-01 | 1990-10-01 | Automotive headlights |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2263460A JP2541869B2 (en) | 1990-10-01 | 1990-10-01 | Automotive headlights |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04141901A true JPH04141901A (en) | 1992-05-15 |
| JP2541869B2 JP2541869B2 (en) | 1996-10-09 |
Family
ID=17389818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2263460A Expired - Fee Related JP2541869B2 (en) | 1990-10-01 | 1990-10-01 | Automotive headlights |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2541869B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007101670A (en) * | 2005-09-30 | 2007-04-19 | Fujitsu Ltd | Wavelength selective optical switch and optical device equipped with spectral function |
| JP2020072020A (en) * | 2018-10-31 | 2020-05-07 | 市光工業株式会社 | Vehicular lighting fixture |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102384541B1 (en) * | 2017-07-19 | 2022-04-11 | 에스엘 주식회사 | Lamp for vehicle |
| KR102463273B1 (en) * | 2017-12-29 | 2022-11-04 | 에스엘 주식회사 | Lamp for vehicle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0269405U (en) * | 1988-11-16 | 1990-05-25 |
-
1990
- 1990-10-01 JP JP2263460A patent/JP2541869B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0269405U (en) * | 1988-11-16 | 1990-05-25 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007101670A (en) * | 2005-09-30 | 2007-04-19 | Fujitsu Ltd | Wavelength selective optical switch and optical device equipped with spectral function |
| JP4489678B2 (en) * | 2005-09-30 | 2010-06-23 | 富士通株式会社 | Wavelength selective optical switch and optical device with spectroscopic function |
| JP2020072020A (en) * | 2018-10-31 | 2020-05-07 | 市光工業株式会社 | Vehicular lighting fixture |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2541869B2 (en) | 1996-10-09 |
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