JPH02103801A - Projector type headlamp - Google Patents
Projector type headlampInfo
- Publication number
- JPH02103801A JPH02103801A JP63256505A JP25650588A JPH02103801A JP H02103801 A JPH02103801 A JP H02103801A JP 63256505 A JP63256505 A JP 63256505A JP 25650588 A JP25650588 A JP 25650588A JP H02103801 A JPH02103801 A JP H02103801A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- projection lens
- type headlamp
- dousers
- douser
- 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
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 238000004040 coloring Methods 0.000 abstract description 7
- 230000004075 alteration Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
- F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
従来のこの種のプロジェクタ型前照灯２１の例を示すも
のが第３図であり、回転楕円面系の反射鏡２２と単レン
ズ系の投影レンズ２３が同軸で対峙し、この反射鏡２２
と投影レンズ２３との両者の中間の位置であり、且つ前
記投影レンズ２３の略焦点の位置に、配光特性」二不要
の部分を遮蔽する遮光板２４を配設したものであり、前
記遮光板２４の形状を投影レンズ２３で前方に投影する
ことにより、設計値通りの配光特性が容昌に得られるも
のとなる。FIG. 3 shows an example of a conventional projector-type headlamp 21 of this type, in which a spheroidal reflecting mirror 22 and a single-lens projecting lens 23 coaxially face each other.
A light shielding plate 24 is provided at an intermediate position between the projection lens 23 and the projection lens 23, and at a position approximately at the focal point of the projection lens 23, for shielding unnecessary portions of the light distribution characteristic. By projecting the shape of the plate 24 forward with the projection lens 23, light distribution characteristics as designed can be easily obtained.
しかしながら、前記した従来の構成のプロジェクタ型前
照灯２１は、前記投影レンズ２３が−・体の透明部材に
よる単レンズで構成されているために、この投影レンズ
２３は色収差を有するものとなり、このような色収差を
有する投影レンズ２３を用いて前記遮光板２４の投影を
行うときには配光１゛）性上の遮蔽される部分と遮蔽さ
れない部分との境界部に赤色、青色あるいは虹色の着色
（ラテラルｈラー）が行われ、運転者に違和感をノｊえ
る否共に、特に路肩にある道路標識など色彩を使用した
破視体に対する視１忍性を１０なうものとなる問題点を
生じ、この点の解決が課題とされ乙ものとなっていた。
尚、この問題の解決手段として色消しレンズを採用する
方法も当然に考えられるが、この種のレンズは極めて高
価なものとなり、この種の前照灯に使用することは側底
に不可能である。However, in the conventional projector type headlight 21 described above, since the projection lens 23 is composed of a single lens made of a transparent member, the projection lens 23 has chromatic aberration. When projecting the light shielding plate 24 using the projection lens 23 having such chromatic aberration, the boundary between the shielded part and the unshielded part due to light distribution (1) is colored red, blue, or rainbow-colored ( In addition to causing a sense of discomfort to the driver, this also poses a problem in that the visual tolerance for colored objects, such as road signs on the shoulder of the road, is reduced by 10. Resolving this issue has been an issue and has remained unresolved. Naturally, a method to solve this problem would be to use an achromatic lens, but this kind of lens would be extremely expensive and it would be impossible to use it in this kind of headlight. be.
本発明は、前記した従来のプロジェクタ型前照灯に生ず
る課題を解決するための具体的手段として、回転楕円面
系の反射鏡と単レンズ系の投影レンズを有し、前記投影
レンズの略焦点の近傍に遮光板を配設して成るプロジェ
クタ型前照灯において、前記遮光板は同−形状とされた
二枚とされ、このプロジェクタ型前照灯の光軸方向に適
宜な間隔を設けて配設されていることを特徴とするプロ
ジェクタ型前照灯を提供することで、境界部が着色され
ないようにして、前記従来の課題を解決するものである
。As a specific means for solving the problems that occur in the conventional projector type headlight described above, the present invention has a spheroidal system reflecting mirror and a single lens system projection lens, and the projection lens has a substantially focal point. In a projector-type headlamp comprising a light-shielding plate disposed near the projector-type headlamp, the light-shielding plate is two pieces having the same shape, and an appropriate interval is provided in the optical axis direction of the projector-type headlamp. By providing a projector-type headlamp characterized by the above-mentioned arrangement, the above-mentioned conventional problems are solved by preventing the border from being colored.
次に、本発明を図に示す一実施例に基づいて詳細に説明
する。
第１図に符号１で示すものは、本発明によるプロジェク
タ型前照灯であり、このプロジェクタ型前照灯１には、
光学的軸Ｚを同軸として回転楕円系の反射鏡２と単レン
ズ系の投影レンズ３とが配設されているのは従来例のも
のと同様であるが、前記反射鏡２と投影レンズ３の中間
の位置であり、且つ前記投影レンズ３の略焦点の位置に
配設される遮光板は本発明により第一遮光板４Ａと第二
遮光板４Ｂの二枚とされている。
以下に、更に詳細に前記第一遮光板４Ａと第二遮光板４
Ｂについて説明すれば、これらの第一遮光板４Ａと第二
遮光板４Ｂとは配光特性」二の不用部分を遮蔽するよう
に同一形状に形成され、前記光学的軸Ｚに沿い間隔を有
して配設されるものとなっている。
第２図に示すものは本発明により、投影レンズ３による
投影像の着色が防止される原理を示すもので、一方の第
一遮光板４Ａを投影レンズ３の例えば青色の焦点ＢＦの
位置に配設し、他の一方の第二遮光板４Ｂを赤色の焦点
ＲＦの位置に配設することで、投影される側においては
前記二枚の遮光板４Ａ１４Ｂの投影像は重なり合うもの
となり、前記した青色と赤色に対して、前記投影レンズ
３の色収差を補正したのと、即ちアクロマチイック（二
色色消し）レンズを採用したのと等価の効果が得られる
ものとなる。
ここで、この発明を成すための発明者による実験の結果
を述べれば、前記した投影像に着色を生じない範囲は、
前記原理として説明した手法、即ち補正を目的とする色
彩に対応する焦点に前記夫々の遮光板４Ａ１４Ｂを位置
させるなど、厳密に設定を行わなくきも充分に効果を生
ずるものであり、具体的には前記投影レンズ３の焦点の
近傍に３ ｍｍ−２０の前記光学軸Ｚ方向の間隔を持つ
第一遮光板４Ａと第二遮光板４Ｂとを配設することで実
用上に支障の無い程度の着色防止作用が得られるもので
あった。
尚、実際に実施に当たっては、前記反射鏡２側に配設さ
れる一方の遮光板、例えば第二遮光板４Ｂにより他の一
方の遮光板４Ａが遮蔽されることの無いように適宜な位
置調整を行うなどの手段は当然に必要である。Next, the present invention will be explained in detail based on an embodiment shown in the drawings. What is indicated by the reference numeral 1 in FIG. 1 is a projector type headlamp according to the present invention, and this projector type headlamp 1 includes:
Similar to the conventional example, a spheroidal reflecting mirror 2 and a single-lens projecting lens 3 are disposed coaxially with the optical axis Z, but the difference between the reflecting mirror 2 and the projection lens 3 is According to the present invention, there are two light shielding plates disposed at an intermediate position and approximately at the focal point of the projection lens 3, a first light shielding plate 4A and a second light shielding plate 4B. The first light shielding plate 4A and the second light shielding plate 4 will be described in more detail below.
To explain B, the first light shielding plate 4A and the second light shielding plate 4B are formed in the same shape so as to shield an unnecessary part of the light distribution characteristic "2", and have an interval along the optical axis Z. It is to be arranged as follows. What is shown in FIG. 2 shows the principle of preventing coloring of the projected image by the projection lens 3 according to the present invention, in which one first light shielding plate 4A is arranged at the focal point BF of the projection lens 3, for example, for blue. By arranging the other second light shielding plate 4B at the position of the red focal point RF, the projected images of the two light shielding plates 4A14B overlap on the projection side, and the blue For red and red, an effect equivalent to correcting the chromatic aberration of the projection lens 3, that is, using an achromatic (dichroic achromatic) lens, can be obtained. Here, to describe the results of experiments conducted by the inventor to accomplish this invention, the range in which no coloring occurs in the projected image is as follows:
The method explained as the principle above, that is, positioning each of the light shielding plates 4A14B at the focal point corresponding to the color to be corrected, is sufficiently effective even without strict settings, and specifically, By arranging a first light shielding plate 4A and a second light shielding plate 4B having an interval of 3 mm-20 in the optical axis Z direction near the focal point of the projection lens 3, coloring can be achieved to a degree that does not cause any practical problems. A preventive effect was obtained. In actual practice, the position must be adjusted appropriately so that one of the light shielding plates disposed on the reflecting mirror 2 side, for example, the second light shielding plate 4B, does not block the other light shielding plate 4A. Naturally, measures such as doing this are necessary.
以上に説明したように本発明により、遮光板は同一形状
とされた二枚とされ、光軸方向に適宜な間隔を設けて配
設されているプロジェクタ型前照灯としたことで、前記
遮光板の投影像である配光特性の境界部に投影レンズの
色収差による着色が生ずることを防止し、もって運転者
なとに与える違和感を排除し、更に前記した着色による
道路標識などの誤認を防止すると云う極めて優れた効果
を奏するものである。As explained above, according to the present invention, the light shielding plate is made of two sheets having the same shape, and by providing a projector type headlamp in which the light shielding plates are arranged at an appropriate interval in the optical axis direction, the light shielding plate is Prevents coloring due to chromatic aberration of the projection lens from occurring at the boundary of the light distribution characteristics, which is the projected image of the board, thereby eliminating the sense of discomfort given to drivers, and further preventing misidentification of road signs, etc. due to the coloring mentioned above. This produces extremely excellent effects.
第１図は本発明に係るプロジェクタ型前照灯の一実施例
を示す断面図、第２図は同じく本発明の原理を示す説明
図、第３図は従来例を示す断面図である。
１・・・・プロジェクタ型前照灯
２・・・・反射鏡
３・・・・投影レンズ
４Ａ１
４Ｂ・・・・遮光板
Ｚ・・・・光学的軸FIG. 1 is a sectional view showing an embodiment of a projector type headlamp according to the present invention, FIG. 2 is an explanatory view showing the principle of the invention, and FIG. 3 is a sectional view showing a conventional example. 1...Projector type headlight 2...Reflector 3...Projection lens 4A1 4B...Shade plate Z...Optical axis
Claims (1)
、前記投影レンズの略焦点の近傍に遮光板を配設して成
るプロジェクタ型前照灯において、前記遮光板は同一形
状とされた二枚とされ、このプロジェクタ型前照灯の光
軸方向に適宜な間隔を設けて配設されていることを特徴
とするプロジェクタ型前照灯。In a projector-type headlamp comprising a spheroidal reflector and a single-lens projection lens, and a light-shielding plate is disposed near the approximate focal point of the projection lens, the light-shielding plate has the same shape. 1. A projector-type headlamp, characterized in that the projector-type headlamp has two sheets arranged at appropriate intervals in the optical axis direction of the projector-type headlamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63256505A JPH02103801A (en) | 1988-10-12 | 1988-10-12 | Projector type headlamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63256505A JPH02103801A (en) | 1988-10-12 | 1988-10-12 | Projector type headlamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02103801A true JPH02103801A (en) | 1990-04-16 |
Family
ID=17293566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63256505A Pending JPH02103801A (en) | 1988-10-12 | 1988-10-12 | Projector type headlamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02103801A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008276955A (en) * | 2007-04-25 | 2008-11-13 | Ichikoh Ind Ltd | Vehicle head light |
| JP2009187722A (en) * | 2008-02-05 | 2009-08-20 | Ichikoh Ind Ltd | Lighting fixture for vehicle |
| JP2009193810A (en) * | 2008-02-14 | 2009-08-27 | Ichikoh Ind Ltd | Vehicle headlight |
| JP2014029830A (en) * | 2012-06-26 | 2014-02-13 | Koito Mfg Co Ltd | Vehicular headlamp |
| WO2017066818A1 (en) * | 2015-10-23 | 2017-04-27 | Zkw Group Gmbh | Micro-projection light module for a motor vehicle headlight, for achieving aplanatic light distrubtion |
| CN106813183A (en) * | 2015-11-27 | 2017-06-09 | 通用汽车环球科技运作有限责任公司 | For the headlight of automobile |
| WO2018069235A1 (en) * | 2016-10-14 | 2018-04-19 | Covestro Deutschland Ag | Device for reducing color fringing |
| WO2020039964A1 (en) * | 2018-08-21 | 2020-02-27 | 株式会社小糸製作所 | Vehicle lamp |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5999601A (en) * | 1982-11-11 | 1984-06-08 | ウエストフエ−リツシエ・メタル・インドウストリ−・コムマンデイト・ゲゼルシヤフト・ヒユツク・ウント・コムパニ− | Downward headlight for vehicle |
-
1988
- 1988-10-12 JP JP63256505A patent/JPH02103801A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5999601A (en) * | 1982-11-11 | 1984-06-08 | ウエストフエ−リツシエ・メタル・インドウストリ−・コムマンデイト・ゲゼルシヤフト・ヒユツク・ウント・コムパニ− | Downward headlight for vehicle |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008276955A (en) * | 2007-04-25 | 2008-11-13 | Ichikoh Ind Ltd | Vehicle head light |
| JP2009187722A (en) * | 2008-02-05 | 2009-08-20 | Ichikoh Ind Ltd | Lighting fixture for vehicle |
| JP2009193810A (en) * | 2008-02-14 | 2009-08-27 | Ichikoh Ind Ltd | Vehicle headlight |
| JP2014029830A (en) * | 2012-06-26 | 2014-02-13 | Koito Mfg Co Ltd | Vehicular headlamp |
| JP2018531496A (en) * | 2015-10-23 | 2018-10-25 | ツェットカーヴェー グループ ゲーエムベーハー | Micro-projection light module for automotive projector for generating light distribution without imaging error |
| CN108139061A (en) * | 2015-10-23 | 2018-06-08 | Zkw集团有限责任公司 | For the micro projection optical module for light distribution of the generation without image error of motor-driven vehicle headlight adapter |
| WO2017066818A1 (en) * | 2015-10-23 | 2017-04-27 | Zkw Group Gmbh | Micro-projection light module for a motor vehicle headlight, for achieving aplanatic light distrubtion |
| US10612741B2 (en) | 2015-10-23 | 2020-04-07 | Zkw Group Gmbh | Micro-projection light module for a motor vehicle headlight, for achieving aplanatic light distribution |
| CN108139061B (en) * | 2015-10-23 | 2020-07-10 | Zkw集团有限责任公司 | Miniature projection light module for a motor vehicle headlight for generating an image-error-free light distribution |
| CN106813183A (en) * | 2015-11-27 | 2017-06-09 | 通用汽车环球科技运作有限责任公司 | For the headlight of automobile |
| WO2018069235A1 (en) * | 2016-10-14 | 2018-04-19 | Covestro Deutschland Ag | Device for reducing color fringing |
| CN109996990A (en) * | 2016-10-14 | 2019-07-09 | 科思创德国股份有限公司 | For reducing the device of color fringe |
| US10619815B2 (en) | 2016-10-14 | 2020-04-14 | Covestro Deutschland Ag | Device for reducing color fringing |
| CN109996990B (en) * | 2016-10-14 | 2021-12-28 | 科思创德国股份有限公司 | Device for reducing color fringing |
| WO2020039964A1 (en) * | 2018-08-21 | 2020-02-27 | 株式会社小糸製作所 | Vehicle lamp |
| JPWO2020039964A1 (en) * | 2018-08-21 | 2021-08-26 | 株式会社小糸製作所 | Vehicle lighting |
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