JPS62287503A - Lamp fixture for vehicle - Google Patents
Lamp fixture for vehicleInfo
- Publication number
- JPS62287503A JPS62287503A JP61128203A JP12820386A JPS62287503A JP S62287503 A JPS62287503 A JP S62287503A JP 61128203 A JP61128203 A JP 61128203A JP 12820386 A JP12820386 A JP 12820386A JP S62287503 A JPS62287503 A JP S62287503A
- Authority
- JP
- Japan
- Prior art keywords
- prism
- refractive
- fresnel lens
- reflective
- light
- 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
- 230000003287 optical effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000002271 resection Methods 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
３、発明の詳細な説明
〔産業上の利用分野〕
本発明は、車輌用灯具、詳しくはフレネルレンズを有す
る直射型の車輌用灯具に関するものである。DETAILED DESCRIPTION OF THE INVENTION 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a vehicular lamp, and more particularly to a direct-light type vehicular lamp having a Fresnel lens.
従来のこの種の車輌用灯具を第２図および第３図を参照
して説明する。A conventional vehicle lamp of this type will be explained with reference to FIGS. 2 and 3.
図において、１はハウジングであって、このハウジング
ｌは前面を開口する。２および３はハウジング１の前面
開口部に配設したフレネルレンズのインナーレンズおよ
び魚眼レンズのアウターレンズである。４はハウジング
１の底の中央に着脱可能に取り付けてハウジングｌおよ
びフレネルレンズ２により画成された灯室１０内に配設
したバルブである。In the figure, 1 is a housing, and this housing l has an open front surface. Reference numerals 2 and 3 denote an inner lens of a Fresnel lens and an outer lens of a fisheye lens, which are disposed in the front opening of the housing 1. Reference numeral 4 denotes a bulb that is detachably attached to the center of the bottom of the housing 1 and disposed within the lamp chamber 10 defined by the housing 1 and the Fresnel lens 2.
前記フレネルレンズ２は、第２図に示すように、バルブ
４と対向する中央部に配設した屈折系プリズム２０と、
その屈折系プリズム（屈折プリズム）２０の周囲に配設
した反射系プリズム（全反射プリズム）２１とから構成
されている。屈折系ブυズム２０は、中心側の面２００
が垂直で、反対側の面２０１が傾斜した形状をなし、同
ピツチで形成されている。一方、反射系プリズム２１は
、中心側の面２１０および反対側の面２１１がほぼ等し
い角度で傾斜した二等辺三角形の形状をなし、同ピ、チ
で形成されている。As shown in FIG. 2, the Fresnel lens 2 includes a refractive prism 20 disposed in the center facing the bulb 4;
It consists of a refraction prism (refraction prism) 20 and a reflection prism (total reflection prism) 21 arranged around it. The refractive beam 20 has a center side surface 200
is vertical, and the opposite surface 201 has an inclined shape and is formed with the same pitch. On the other hand, the reflective prism 21 has an isosceles triangular shape in which the center side surface 210 and the opposite side surface 211 are inclined at approximately the same angle, and are formed with the same pitch.
次に、その作用について説明する。Next, its effect will be explained.
まず、バルブ４からフレネルレンズ２の屈折系プリズム
２０側に入射した光ａは、屈折系プリズム２０の傾斜面
２０１において屈折してフレネルレンズ２内に入射し、
光軸Ｘ−Ｘとほぼ平行に、フレネルレンズ２内を直進し
てフレネルレンズ２の表面からアウターレンズ３側に出
射される。First, light a that enters the refractive prism 20 side of the Fresnel lens 2 from the bulb 4 is refracted at the inclined surface 201 of the refractive prism 20 and enters the Fresnel lens 2,
The light travels straight through the Fresnel lens 2 almost parallel to the optical axis XX and is emitted from the surface of the Fresnel lens 2 to the outer lens 3 side.
一方、バルブ４からフレネルレンズ２の反射系プリズム
２１側に入射した光すは、反射系プリズム２１の中心側
の傾斜面２１０から入射してフレネルレンズ２内を直進
し、反対側の傾斜面２１１において全反射し、光軸Ｘ−
Ｘとほぼ平行に、フレネルレンズ２内を直進してフレネ
ルレンズ２の表面からアウターレンズ３側に出射される
。On the other hand, the light incident from the bulb 4 to the reflecting prism 21 side of the Fresnel lens 2 enters from the inclined surface 210 on the center side of the reflecting prism 21, travels straight through the Fresnel lens 2, and passes through the inclined surface 210 on the opposite side. It is totally reflected at the optical axis X-
The light travels straight through the Fresnel lens 2 almost parallel to X, and is emitted from the surface of the Fresnel lens 2 to the outer lens 3 side.
以上のようにしてフレネルレンズ２から光軸Ｘ−Ｘとほ
ぼ平行に出射された光はアウターレンズ３に入射し、そ
のアウターレンズ３から拡散光として外に出射される。The light emitted from the Fresnel lens 2 in the above manner substantially parallel to the optical axis XX enters the outer lens 3, and is emitted from the outer lens 3 to the outside as diffused light.
かかる車輌用灯具においては、屈折系プリズム２０と、
反射系プリズム２１とのレンズ内の光の経路長が違うの
で、効率すなわち明るさが違う。In such a vehicle lamp, a refractive prism 20;
Since the path length of the light inside the lens is different from that of the reflective prism 21, the efficiency, that is, the brightness is different.
ところが、上述の従来の車輌用灯具は、屈折系プリズム
２０の周囲に反射系プリズム２１を直接配設したので、
屈折系プリズム２０と反射系プリズム２１との境Ａが明
確に表われる。このために、灯具中心が明るく、その周
囲が暗く、その明暗の差（輝度の差）が顕著に表われ、
見映えの点で見難いと言う問題がある。However, in the above-mentioned conventional vehicle lamp, the reflective prism 21 is directly disposed around the refractive prism 20.
The boundary A between the refractive prism 20 and the reflective prism 21 is clearly visible. For this reason, the center of the lamp is bright and the surrounding area is dark, and the difference in brightness (difference in brightness) is noticeable.
There is a problem with the appearance that it is difficult to see.
本発明の目的は、見映えの良い車輌用灯具を提供するこ
とにある。An object of the present invention is to provide a vehicle lamp with good appearance.
本発明は、フレネルレンズの屈折系プリズムと反射系プ
リズムとの境部分に屈折および反射両系プリズムを形成
したことを特徴とする。The present invention is characterized in that a refractive and reflective prism is formed at the boundary between the refractive prism and the reflective prism of the Fresnel lens.
本発明は、屈折系プリズムと反射系プリズムとの間に設
けた屈折および反射両系プリズムにより、屈折系プリズ
ムと反射系プリズムとの境をぼかし、明暗の差を少なく
することができる。In the present invention, the boundary between the refractive prism and the reflective prism can be blurred and the difference in brightness can be reduced by using the refractive and reflective prisms provided between the refractive prism and the reflective prism.
以下、本発明の車輌用灯具の一実施例を第１図を参照し
て説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle lamp according to the present invention will be described below with reference to FIG.
図中、第２図および第３図と同符号は同一のものを示す
。In the figure, the same reference numerals as in FIGS. 2 and 3 indicate the same parts.
２２はフレネルレンズ２の屈折系プリズム２０と反射系
プリズム２１との間に配設した屈折および反射両系プリ
ズムであって、この屈折および反射両系プリズム２２は
、反射系プリズム２１の頂部を切除し、かつその切除量
を中心（屈折系プリズム２０側）から外側（反射系プリ
ズム２１側）にかけて徐々に少なくして形成したもので
ある。すなわち、反射系プリズム２１と同様に、中心側
の面２２０および反対側の面２２１が等しい角度で傾斜
した二等辺三角形形状をなし、かつ同ピツチで形成され
、その頂部を屈折系プリズム２０の傾斜面２０１ とほ
ぼ等しい角度の傾斜面２２２で切除する。その切除量、
例えば二等辺三角形の頂点から中心側の傾斜面２２０と
切除傾斜面２２２との交点までの距離βＩ、Ａ２．ｆ！
・・・と徐々に小さくしていく。22 is a refractive and reflective prism disposed between the refractive prism 20 and the reflective prism 21 of the Fresnel lens 2; In addition, the amount of removal is gradually decreased from the center (on the refractive prism 20 side) to the outside (on the reflective prism 21 side). That is, similar to the reflective prism 21, the center side surface 220 and the opposite surface 221 are formed in an isosceles triangular shape inclined at the same angle, and are formed with the same pitch, and the apex is formed by the inclined surface of the refractive prism 20. It is cut at an inclined surface 222 having an angle approximately equal to that of the surface 201. The amount of resection,
For example, the distance βI, A2. f!
...and gradually become smaller.
この実施例における本発明の車輌用灯具は、以上の如き
構成よりなり、以下その作用について説明する。The vehicular lamp of the present invention in this embodiment has the above-mentioned structure, and its operation will be explained below.
まず、バルブ４からフレネルレンズ２の屈折系プリズム
２０側に入射した光ａは、屈折系プリズム２０の傾斜面
２０１において屈折してフレネルレンズ２内に入射し、
光軸Ｘ−Ｘとほぼ平行に、フレネルレンズ２内を直進し
てフレネルレンズ２の表面からアウターレンズ３側に出
射される。First, light a that enters the refractive prism 20 side of the Fresnel lens 2 from the bulb 4 is refracted at the inclined surface 201 of the refractive prism 20 and enters the Fresnel lens 2,
The light travels straight through the Fresnel lens 2 almost parallel to the optical axis XX and is emitted from the surface of the Fresnel lens 2 to the outer lens 3 side.
一方、バルブ４からフレネルレンズ２の反射系プリズム
２１側に入射した光すは、第３図に示すように、反射系
プリズム２１の中心側の傾斜面２１０から入射してフレ
ネルレンズ２内を直進し、反対側の傾斜面２１１におい
て全反射し、光軸Ｘ−Ｘとほぼ平行に、フレネルレンズ
２内を直進してフレネルレンズ２の表面からアウターレ
ンズ３側に出射される。On the other hand, as shown in FIG. 3, the light that enters the reflecting prism 21 side of the Fresnel lens 2 from the bulb 4 enters from the inclined surface 210 on the center side of the reflecting prism 21 and travels straight inside the Fresnel lens 2. The light is totally reflected on the opposite inclined surface 211, travels straight through the Fresnel lens 2 almost parallel to the optical axis XX, and is emitted from the surface of the Fresnel lens 2 to the outer lens 3 side.
そして、屈折および反射両系プリズム２２の内切除傾斜
面２２２に入射した光ｃ２は、その切除顛斜面２２２に
おいて屈折してフレネルレンズ２内に入射し、光軸Ｘ−
Ｘとほぼ平行に、フレネルレンズ２内を直進してフレネ
ルレンズ２の表面から７ウターレンズ３側に出射される
。The light c2 incident on the internal cutting slope 222 of the refracting and reflecting prism 22 is refracted at the cutting slope 222 and enters the Fresnel lens 2, and the optical axis
The light travels straight through the Fresnel lens 2 almost parallel to X, and is emitted from the surface of the Fresnel lens 2 to the outer lens 3 side.
また、屈折および反射両系プリズム２２の円中心側傾斜
面２２０に入射した光ＣＯは、その中心側傾斜面２２０
において屈折して入射し、フレネルレンズ２内を直進し
、反対側の傾斜面２２１において全反射し、光軸Ｘ−Ｘ
とほぼ平行に、フレネルレンズ２内を直進してフレネル
レンズ２の表面からアウターレンズ３側に出射される。Furthermore, the light CO incident on the circular center side inclined surface 220 of the refractive and reflective prism 22 is
It is refracted and incident on the Fresnel lens 2, and is totally reflected on the opposite inclined surface 221, and the optical axis X-X
The light travels straight through the Fresnel lens 2 almost parallel to the direction of the light beam, and is emitted from the surface of the Fresnel lens 2 to the outer lens 3 side.
ここで、屈折および反射両系プリズム２２の内切除傾斜
面２２２に入射して屈折する光Ｃ２の光束量は、中心か
ら外側に行くに従って切除傾斜面２２２の面積の減少に
伴って徐々に少なくなる。一方、屈折および反射両系プ
リズム２２の内反対側の傾斜面２２１に入射して屈折す
る光ＣＯの光束量は、中心から外側に行くに従って反対
側の傾斜面２２１の面積の増大に伴って徐々に大きくな
る。従って、屈折系プリズム２０と反射系プリズム２１
との間に設けた屈折および反射両系プリズム２２により
、屈折系プリズム２０と反射系プリズム２１との境をぼ
かし、屈折系プリズム２０の明部から徐々に暗くして反
射系プリズム２１の暗部に移行させることができ、明暗
の差をなくし見映えが良くなる。Here, the amount of luminous flux of the light C2 that enters and is refracted by the internal cutting slope 222 of the refractive and reflective prism 22 gradually decreases as the area of the cutting slope 222 decreases from the center to the outside. . On the other hand, the amount of luminous flux of the light CO that is incident on and refracted by the opposite inclined surface 221 of the refractive and reflective prism 22 gradually increases as the area of the opposite inclined surface 221 increases from the center to the outside. becomes larger. Therefore, the refractive prism 20 and the reflective prism 21
The refractive and reflective prism 22 provided between the refractive and reflective prisms blurs the boundary between the refractive prism 20 and the reflective prism 21, and gradually darkens the bright part of the refractive prism 20 to the dark part of the reflective prism 21. This eliminates the difference in brightness and improves the appearance.
以上のようにしてフレネルレンズ２から光軸Ｘ−Ｘとほ
ぼ平行に出射された光はアウターレンズ３に入射し、そ
のアウターレンズ３から拡散光として外に出射される。The light emitted from the Fresnel lens 2 in the above manner substantially parallel to the optical axis XX enters the outer lens 3, and is emitted from the outer lens 3 to the outside as diffused light.
以上から明らかなように、本発明の車輌用灯具は、屈折
系プリズムと反射系プリズムとの間に屈折および反射両
系プリズムを設けたものであるから、屈折系プリズムと
反射系プリズムとの境をぼかし、明暗の差を少なくする
ことができる。従って、灯具全体の見映えが良い。As is clear from the above, since the vehicle lamp of the present invention has both a refractive and a reflective prism between the refractive prism and the reflective prism, the boundary between the refractive prism and the reflective prism is It is possible to blur the image and reduce the difference between brightness and darkness. Therefore, the overall appearance of the lamp is good.
第１図は本発明の車輌用灯具の一実施例を示したフレネ
ルレンズの一部（屈折系プリズムおよび屈折２反射両系
プリズム）の拡大図である。第２図は従来の車輌用灯具
を示した断面図、第３図は第２図における■部拡大図で
ある。
■・・・ハウジング、１０・・・灯室、２・・・フレネ
ルレンズ、２０・・・屈折系プリズム、２１・・・反射
系プリズム、２２・・・屈折および反射両系プリズム、
４・・・バルブ。FIG. 1 is an enlarged view of a part of a Fresnel lens (a refractive prism and a refractive and dual-reflective prism) showing an embodiment of a vehicle lamp according to the present invention. FIG. 2 is a cross-sectional view of a conventional vehicle lamp, and FIG. 3 is an enlarged view of the section ``■'' in FIG. ■... Housing, 10... Light chamber, 2... Fresnel lens, 20... Refraction system prism, 21... Reflection system prism, 22... Both refraction and reflection system prism,
4...Valve.
Claims (1)
したフレネルレンズと、そのフレネルレンズおよびハウ
ジングにより画成された灯室内に配設したバルブとを備
え、前記フレネルレンズは屈折系プリズムと、その屈折
系プリズムの周囲に配設した反射系プリズムとから構成
されている車輌用灯具において、前記フレネルレンズの
屈折系プリズムと反射系プリズムとの境部分に屈折およ
び反射両系プリズムを形成したことを特徴とする車輌用
灯具。1. A housing, a Fresnel lens disposed in the front opening of the housing, and a bulb disposed in a lamp chamber defined by the Fresnel lens and the housing, and the Fresnel lens includes a refractive prism and a In a vehicle lamp comprising a refractive prism and a reflective prism arranged around the refractive prism, a refractive and reflective prism is formed at the boundary between the refractive prism and the reflective prism of the Fresnel lens. Characteristic vehicle lighting equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61128203A JPS62287503A (en) | 1986-06-04 | 1986-06-04 | Lamp fixture for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61128203A JPS62287503A (en) | 1986-06-04 | 1986-06-04 | Lamp fixture for vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62287503A true JPS62287503A (en) | 1987-12-14 |
| JPH0511361B2 JPH0511361B2 (en) | 1993-02-15 |
Family
ID=14979020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61128203A Granted JPS62287503A (en) | 1986-06-04 | 1986-06-04 | Lamp fixture for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62287503A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0284204U (en) * | 1988-12-19 | 1990-06-29 | ||
| CN102242904A (en) * | 2010-04-27 | 2011-11-16 | 西铁城电子株式会社 | Lens member and optical unit using the same |
| JP2012098691A (en) * | 2010-10-05 | 2012-05-24 | Enplas Corp | Luminous flux control member and optical device including the same |
-
1986
- 1986-06-04 JP JP61128203A patent/JPS62287503A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0284204U (en) * | 1988-12-19 | 1990-06-29 | ||
| CN102242904A (en) * | 2010-04-27 | 2011-11-16 | 西铁城电子株式会社 | Lens member and optical unit using the same |
| JP2011232512A (en) * | 2010-04-27 | 2011-11-17 | Citizen Electronics Co Ltd | Lens member and optical unit |
| JP2012098691A (en) * | 2010-10-05 | 2012-05-24 | Enplas Corp | Luminous flux control member and optical device including the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0511361B2 (en) | 1993-02-15 |
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