JP2010108604A - Spotlight - Google Patents

Spotlight Download PDF

Info

Publication number
JP2010108604A
JP2010108604A JP2008276336A JP2008276336A JP2010108604A JP 2010108604 A JP2010108604 A JP 2010108604A JP 2008276336 A JP2008276336 A JP 2008276336A JP 2008276336 A JP2008276336 A JP 2008276336A JP 2010108604 A JP2010108604 A JP 2010108604A
Authority
JP
Japan
Prior art keywords
light source
reflecting mirror
light
aperture
mirror
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
Application number
JP2008276336A
Other languages
Japanese (ja)
Other versions
JP5385587B2 (en
Inventor
Yoshimichi Yakuya
善道 役野
Yoko Matsubayashi
容子 松林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Panasonic Electric Works Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Panasonic Electric Works Co Ltd filed Critical Panasonic Electric Works Co Ltd
Priority to JP2008276336A priority Critical patent/JP5385587B2/en
Publication of JP2010108604A publication Critical patent/JP2010108604A/en
Application granted granted Critical
Publication of JP5385587B2 publication Critical patent/JP5385587B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent center dent of luminance distribution and raise optical efficiency of a spotlight in which a light source held by its light source socket is arranged through an aperture facing the light source socket of a reflecting mirror. <P>SOLUTION: The spotlight 1 is provided with the light source 2 held by the light source socket 3, a first and a second reflecting mirrors 4, 5 to reflect light from the light source 2, an aperture 7 to choose reflected light, and a converging lens 9 to refract light passing through the aperture 7. The first mirror 4 is provided with a reflective surface 41, almost half-oval shaped at cross section with an opening 42 facing the light source socket 3 and an opening 43 facing the aperture 7. The second mirror 5 is arranged on the light source socket 3, sharing the same focus with the first mirror 4, with its shape to be a part of the oval shape at its cross section. Reflected light 24 of the first mirror 4 and reflected light 25 by the second mirror 5 of leaked light 26 from the opening 42 are concentrated on the same focus 71. This prevents the center vent of the illumination distribution, and eliminates light patches, and improves the optical efficiency. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、光源の光を反射鏡で反射させ、集束レンズにより屈折して照射するスポットライトに関する。   The present invention relates to a spotlight that reflects light from a light source with a reflecting mirror and refracts and irradiates with a focusing lens.

従来、この種のスポットライトの光学系で用いられる反射鏡は球面を成し、光源は反射鏡の回転軸である光軸に対して垂直に設置され、光源取り付け穴は反射鏡に設けられることはなかった。このようなスポットライトを図４に示す。このスポットライト１００においては、光源１０２は反射鏡１０４の回転軸の光軸１１０に対して垂直に設置され、筐体１０５内に設けたスライド機構（不図示）によって光源１０２と反射鏡１０４を移動させることにより、集束レンズ１０６を通して照射される照射パターン径を変え、一台で狭角から広角の照射パターンを実現している。また、反射鏡１０４が球面であるので、直射光と反射光を同経路とすることにより、図４に示すように、光軸１１０を中心とする照度分布特性２００は、直射光と反射光による配光違いによる縞を発生させることなく、滑らかな照射パターンとなる。   Conventionally, the reflector used in this kind of spotlight optical system has a spherical surface, the light source is installed perpendicular to the optical axis that is the rotation axis of the reflector, and the light source mounting hole is provided in the reflector. There was no. Such a spotlight is shown in FIG. In this spotlight 100, the light source 102 is installed perpendicular to the optical axis 110 of the rotating shaft of the reflecting mirror 104, and the light source 102 and the reflecting mirror 104 are moved by a slide mechanism (not shown) provided in the housing 105. As a result, the irradiation pattern diameter irradiated through the focusing lens 106 is changed, and an irradiation pattern from a narrow angle to a wide angle is realized with a single unit. Further, since the reflecting mirror 104 is a spherical surface, the illuminance distribution characteristic 200 centered on the optical axis 110 is obtained by direct light and reflected light as shown in FIG. A smooth irradiation pattern is obtained without generating stripes due to light distribution differences.

このような構成のスポットライト１００は、反射鏡１０４が光源１０２の光により光軸１１０近傍の面を中心として温度が上昇し、光源１０２が高出力の場合に、反射鏡１０４の反射面部材によっては、反射面の熱変形や表面コーティング材と下地材との熱化学変化等により反射光率が劣化するなど、高出力光源の使用には不向きであった。   In the spotlight 100 having such a configuration, when the temperature of the reflecting mirror 104 rises around the surface near the optical axis 110 due to the light from the light source 102 and the light source 102 has a high output, the reflecting surface member of the reflecting mirror 104 Is unsuitable for the use of a high-power light source, for example, the reflected light rate deteriorates due to thermal deformation of the reflecting surface or thermochemical changes between the surface coating material and the base material.

これに対し、光効率の良い楕円形の反射鏡を用い、光源を光軸に対して平行に設置したスポットライトが知られている（例えば、特許文献１参照）。このようなスポットライトを図５に示す。このスポットライト１０１は、筐体１０５内に光源１０２の光軸１１０方向に移動自在なスライドボックス１０７と、楕円形の反射鏡１０８とを備え、反射鏡１０８には、光源ソケット１０３を臨む開口１０９が形成され、光源１０２が開口１０９を貫通して光軸１１０と平行に配設され、アパーチャー１１１及び集束レンズ１０６を介して光が出射される。   On the other hand, a spotlight in which an elliptical reflecting mirror with high light efficiency is used and a light source is installed in parallel to the optical axis is known (for example, see Patent Document 1). Such a spotlight is shown in FIG. The spotlight 101 includes a slide box 107 that can move in the direction of the optical axis 110 of the light source 102 and an elliptical reflecting mirror 108 in a housing 105. The reflecting mirror 108 has an opening 109 that faces the light source socket 103. The light source 102 passes through the opening 109 and is disposed in parallel with the optical axis 110, and light is emitted through the aperture 111 and the focusing lens 106.

光源１０２の発光部の中心を反射鏡１０８の焦点に配置し、他の焦点位置にアパーチャー１１１を設けることにより、アパーチャー１１１を擬似光源とし、光源１０２と反射鏡１０８とアパーチャー１１１とを一体に移動させて照射パターン径を変えて、一台で狭角から広角の照射パターンを実現している。この光学系においては、直射光が殆どアパーチャー１１１を通過しないことにより、直射光と反射光による配光違いによる縞を発生させることなく、滑らかな照射パターンを実現できる。   By placing the center of the light emitting part of the light source 102 at the focal point of the reflecting mirror 108 and providing the aperture 111 at another focal position, the aperture 111 is used as a pseudo light source, and the light source 102, the reflecting mirror 108, and the aperture 111 are moved together. Thus, the irradiation pattern diameter is changed, and a single-unit irradiation pattern is realized from a narrow angle to a wide angle. In this optical system, since the direct light hardly passes through the aperture 111, a smooth irradiation pattern can be realized without generating a stripe due to a difference in light distribution between the direct light and the reflected light.

しかしながら、上記スポットライト１０１においては、開口１０９から光源１０２の光が漏れるため、照度分布の中心照度が低下する。このとき、開口１０９の開口径が小さい場合は、照度分布の中心照度の低下が少なく、光効率の劣化も少ないが、光源１０２の取替えの際などに、光源１０２が開口１０９に接触して傷が付き、破損の原因となる。このため、開口１０９を必要以上に小さくできず、開口１０９からの光の漏れを避けることができない。また、開口１０９からの漏れ光は、光軸１１０に近く、光軸１１０に対して平行に近いため、反射光の中でも最も中心照度に与える影響が大きい。   However, in the spotlight 101, since the light from the light source 102 leaks from the opening 109, the central illuminance of the illuminance distribution decreases. At this time, when the opening diameter of the opening 109 is small, the central illuminance of the illuminance distribution is less decreased and the light efficiency is less deteriorated. However, when the light source 102 is replaced, the light source 102 comes into contact with the opening 109 and is damaged. Will cause damage. For this reason, the opening 109 cannot be made smaller than necessary, and light leakage from the opening 109 cannot be avoided. In addition, the leakage light from the opening 109 is close to the optical axis 110 and is almost parallel to the optical axis 110, so that it has the largest influence on the central illuminance among the reflected light.

従って、図５に示すように、スポットライトの照度分布特性２００は、照射パターン中心部の照度が低くなる中落ちと呼ばれる現象が生じていた。   Therefore, as shown in FIG. 5, the illuminance distribution characteristic 200 of the spotlight has a phenomenon called “falling down” in which the illuminance at the center of the irradiation pattern decreases.

特に、光源に高ワットのハロゲンランプを用いたときには、フィラメントのコイルが長くなり、加えて小型化要求のため、低ワットと同等の小さい反射鏡を共用する場合は、フィラメントはその中心を反射鏡の焦点に合わせるため、フィラメントが長い分、開口１０９に近付き、開口１０９から漏れる光量も増加する。従って、高ワットのランプを用いたスポットライトでは、特に中落ちによる効率低下が生じ易い。
特開２００４−３１０５６号公報 In particular, when a high-wattage halogen lamp is used as the light source, the coil of the filament becomes long. In addition, if a small reflector equivalent to a low watt is shared due to the demand for miniaturization, the filament is centered on the reflector. Therefore, the amount of light that leaks from the opening 109 increases as the filament becomes longer. Therefore, in a spotlight using a high-wattage lamp, the efficiency is particularly likely to decrease due to a drop.
JP 2004-31056 A

本発明は、上記の問題を解決するためになされたものであり、光源ソケットに保持された光源が反射鏡の光源ソケットに臨む開口を通して配設されたスポットライトにおいて、照度分布の中落ちを抑制し、光効率を高めることができるスポットライトを提供することを目的とする。   The present invention has been made to solve the above-described problem, and in a spotlight in which a light source held in a light source socket is disposed through an opening facing a light source socket of a reflecting mirror, a drop in illuminance distribution is suppressed. And it aims at providing the spotlight which can improve light efficiency.

上記目的を達成するために請求項１の発明は、光源ソケットに保持される光源と、前記光源からの光を反射する反射鏡と、前記反射鏡からの反射光を選択するアパーチャーと、前記アパーチャーから出力される通過光を屈折させる光学部材と、を備え、前記光源と反射鏡とアパーチャーと光学部材は共通の光軸上に配置されてなるスポットライトであって、前記反射鏡は、第１反射鏡と第２反射鏡を有し、前記第１反射鏡は、前記アパーチャーに臨む面と、前記光源ソケットに臨む面が開放され、光軸を軸とし、前記アパーチャー側に開口した断面略半楕円形の反射面を有し、前記第２反射鏡は、前記光源ソケットに取り付けられているものである。   In order to achieve the above object, the invention of claim 1 is directed to a light source held in a light source socket, a reflecting mirror that reflects light from the light source, an aperture that selects reflected light from the reflecting mirror, and the aperture. An optical member that refracts the passing light output from the light source, the light source, the reflecting mirror, the aperture, and the optical member are arranged on a common optical axis. A reflecting mirror and a second reflecting mirror, the first reflecting mirror having a surface facing the aperture and a surface facing the light source socket being open, and having an optical axis as an axis and having an opening on the aperture side; An ellipsoidal reflecting surface is provided, and the second reflecting mirror is attached to the light source socket.

請求項２の発明は、前記第２反射鏡は、前記第１反射鏡と共通の焦点を有する断面楕円の一部形状を有するものである。   According to a second aspect of the present invention, the second reflecting mirror has a partial shape of a cross-sectional ellipse having a common focal point with the first reflecting mirror.

請求項３の発明は、前記第２反射鏡は、前記第１反射鏡の焦点の近傍点を中心とする球面形状であるものである。   According to a third aspect of the present invention, the second reflecting mirror has a spherical shape centered on a point near the focal point of the first reflecting mirror.

請求項１の発明によれば、第１反射鏡の光源ソケットに臨む面の開口から漏れた光源からの光を第２反射鏡で反射して光学部材に到達させることができるので、照度分布の中心照度が低下する中落ちを軽減でき、照射光の光斑を低減できると共に、光効率を高めることができる。また、第１反射鏡の光源ソケット側の開口を大きくできるので、光源取替えの際、取替え作業が容易になり、光源の反射鏡と接触による破損も低減できる。   According to the first aspect of the present invention, the light from the light source leaking from the opening of the surface facing the light source socket of the first reflecting mirror can be reflected by the second reflecting mirror and reach the optical member. It is possible to reduce the drop in the center illuminance, to reduce the light spots of the irradiated light, and to increase the light efficiency. Further, since the opening on the light source socket side of the first reflecting mirror can be enlarged, the replacement work is facilitated when the light source is replaced, and damage due to contact with the reflecting mirror of the light source can be reduced.

請求項２の発明によれば、第１反射鏡及び第２反射鏡からの反射光を略同じ位置に集光させることができるので、効率的に光学部材へ到達する光を増やすことができる。   According to invention of Claim 2, since the reflected light from a 1st reflective mirror and a 2nd reflective mirror can be condensed at the substantially same position, the light which reaches | attains an optical member efficiently can be increased.

請求項３の発明によれば、第２反射鏡からの反射光が、反射位置に関係なく略一様のレベルで第１反射鏡の焦点に位置される光源近傍に集光され、第１反射鏡で反射されて光学部材へ到達されるので、照度分布の中心付近において低減される照度を略同じ反射光量で上昇させることができ、照度分布をより滑らかにすることができる。   According to the invention of claim 3, the reflected light from the second reflecting mirror is condensed in the vicinity of the light source located at the focal point of the first reflecting mirror at a substantially uniform level regardless of the reflecting position, and the first reflecting mirror is collected. Since the light is reflected by the mirror and reaches the optical member, the illuminance reduced near the center of the illuminance distribution can be increased with substantially the same amount of reflected light, and the illuminance distribution can be made smoother.

以下、本発明の第１の実施形態に係るスポットライトについて、図面を参照して説明する。図１は本実施形態に係るスポットライトの構成を示す。なお、図中の右側には、照度分布特性を合わせて示す。   Hereinafter, a spotlight according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of a spotlight according to this embodiment. Note that the illuminance distribution characteristics are also shown on the right side of the figure.

スポットライト１は、光源ソケット３に保持される光源２と、光源２からの光を反射する第１反射鏡４及び第２反射鏡５と、光源２と第１、第２反射鏡４、５とを収容し、光源２の光軸１１方向に移動自在なスライドボックス６と、スライドボックス６に設けられ、第１、第２反射鏡４、５で反射された反射光を選択するアパーチャー７と、スライドボックス６を収容する筐体８と、アパーチャー７を通過した光を屈折させる集束レンズ（光学部材）９とを備える。光源２と第１、第２反射鏡４、５とアパーチャー７と集束レンズ９は共通の光軸１１上に配置されている。   The spotlight 1 includes a light source 2 held in a light source socket 3, a first reflecting mirror 4 and a second reflecting mirror 5 that reflect light from the light source 2, and a light source 2 and first and second reflecting mirrors 4, 5. And a slide box 6 that is movable in the direction of the optical axis 11 of the light source 2, and an aperture 7 that is provided in the slide box 6 and selects the reflected light reflected by the first and second reflecting mirrors 4 and 5. A housing 8 that houses the slide box 6 and a focusing lens (optical member) 9 that refracts the light that has passed through the aperture 7 are provided. The light source 2, the first and second reflecting mirrors 4, 5, the aperture 7, and the focusing lens 9 are disposed on a common optical axis 11.

光源２は、ハロゲンランプや白熱電球等で構成されており、その口金（不図示）が光源ソケット３のソケット部３１に装着されて電力が供給されると、光源２の発光体を収納するバルブ２１内に封入されたフィラメント２２が熱放射によって発光する。   The light source 2 is composed of a halogen lamp, an incandescent light bulb, or the like. When a cap (not shown) is attached to the socket portion 31 of the light source socket 3 and electric power is supplied, a bulb for storing the light emitter of the light source 2. The filament 22 enclosed in 21 emits light by thermal radiation.

光源ソケット３は、光源２の口金を装着するソケット部３１と、ソケット部３１を固定するソケット台座３２を有し、スライドボックス６に固定された支持具６１により支持されている。   The light source socket 3 has a socket part 31 for mounting the base of the light source 2 and a socket base 32 for fixing the socket part 31, and is supported by a support 61 fixed to the slide box 6.

第１反射鏡４は、光軸１１を軸とし、アパーチャー７側に開口した断面半楕円形の凹型の反射面４１を有し、光源ソケット３に臨む面に開口４２を有し、アパーチャー７に臨む面に開口４３を有する。これら開口４２から開口４３に向けて、光源２が光軸１１と平行に配設される。光源２は、第１反射鏡４の頂点側にフィラメント２２の長軸が共通の光軸１１に略一致するように配置される。この第１反射鏡４と光源２から成る光学系においては、光源２の直接光が殆どアパーチャー７を通過しない。   The first reflecting mirror 4 has a concave reflecting surface 41 having a semi-elliptical cross section that opens on the aperture 7 side with the optical axis 11 as an axis, and has an opening 42 on the surface facing the light source socket 3. An opening 43 is provided on the facing surface. The light source 2 is disposed in parallel with the optical axis 11 from the opening 42 toward the opening 43. The light source 2 is arranged on the apex side of the first reflecting mirror 4 so that the long axis of the filament 22 substantially coincides with the common optical axis 11. In the optical system composed of the first reflecting mirror 4 and the light source 2, the direct light of the light source 2 hardly passes through the aperture 7.

第２反射鏡５は、第１反射鏡４と光軸１１上に共通の焦点を有し、光軸１１を軸とし、断面が楕円の一部形状を成す反射面５１を有し、反射面５１の中央部において、第２反射鏡５を光源ソケット３に取り付けるための開口５２を有している。このとき、第２反射鏡５は、第１反射鏡４の開口４２を外囲するように光源ソケット３に取り付けられ、開口４２を通過してきた光源２からの漏れ光２６を反射して、再び開口４２を通してアパーチャー７側に送出する。   The second reflecting mirror 5 has a common focal point on the optical axis 11 with the first reflecting mirror 4, and has a reflecting surface 51 that has an optical axis 11 as an axis and has a partially elliptical cross section. An opening 52 for attaching the second reflecting mirror 5 to the light source socket 3 is provided at the center of 51. At this time, the second reflecting mirror 5 is attached to the light source socket 3 so as to surround the opening 42 of the first reflecting mirror 4, reflects the leaked light 26 from the light source 2 that has passed through the opening 42, and again It sends out to the aperture 7 side through the opening 42.

スライドボックス６は、光源２と、光源ソケット３と、第１、第２反射鏡４、５とを収容するための内部空間を有し、支持具６１によって、光源ソケット３と反射鏡４が支持されている。また、スライドボックス６の光出射側のアパーチャー７は、その中心が光軸１１と略一致するように配置されており、光源２からの直接光と反射光が選択されて通過することにより、疑似光源が生成される。このスライドボックス６は、筐体８に設けたスライド機構（不図示）によって、前後にスライドすることで、光源２と第１、第２反射鏡４、５とアパーチャー７とが互いの光学関係を保った状態で集束レンズ９に対して近接、離間する。このスライド移動により、１台で照射パターン径を変えて、狭角から広角の照射パターンを実現することができる。   The slide box 6 has an internal space for accommodating the light source 2, the light source socket 3, and the first and second reflecting mirrors 4 and 5, and the light source socket 3 and the reflecting mirror 4 are supported by the support tool 61. Has been. The aperture 7 on the light exit side of the slide box 6 is arranged so that the center thereof substantially coincides with the optical axis 11, and the direct light and the reflected light from the light source 2 are selected and passed through, so that A light source is generated. The slide box 6 is slid back and forth by a slide mechanism (not shown) provided in the housing 8, so that the light source 2, the first and second reflecting mirrors 4, 5 and the aperture 7 have an optical relationship with each other. In this state, the focusing lens 9 approaches and separates from the focusing lens 9. By this slide movement, the irradiation pattern diameter can be changed by one unit, and a narrow-angle to wide-angle irradiation pattern can be realized.

筐体８は、スライドボックス６を光軸１１方向に移動可能とする内部空間を有し、光出射側の前端部に設けられた開口を覆い、かつ、光軸が光軸１１と略一致するように集束レンズ９が設けられている。集束レンズ９は、アパーチャー７に生成された擬似光源からの光を集光するものであって、例えば、フルネルレンズや平凸レンズで構成され、入射光を光軸１１に近づけるように屈折する。   The housing 8 has an internal space that allows the slide box 6 to move in the direction of the optical axis 11, covers an opening provided at the front end portion on the light emitting side, and the optical axis substantially coincides with the optical axis 11. Thus, a focusing lens 9 is provided. The converging lens 9 condenses the light from the pseudo light source generated in the aperture 7, and is composed of, for example, a Furnell lens or a plano-convex lens, and refracts incident light so as to approach the optical axis 11.

次に、上述した構成により得られるスポットライト１の照度分布特性について説明する。スポットライト１においては、第１、第２反射鏡４、５はそれぞれ、光軸１１上で光源２の配置される側にある第１焦点２３と、アパーチャー７の配置される側にある第２焦点７１とを有しており、これら２つの焦点は、各反射鏡の楕円形状により決定される。ここで、第１反射鏡４と第２反射鏡５とは、光軸１１上で共通の焦点を有し、第２反射鏡５ａの第１焦点と第２焦点は、それぞれ第１反射鏡４の第１焦点２３と第２焦点７１とに一致し、互いの第１、第２焦点がそれぞれ同位置に設定されている。また、光源２は、フィラメント２２の中心部が第１焦点２３に位置するように配設されている。   Next, the illuminance distribution characteristics of the spotlight 1 obtained by the above configuration will be described. In the spotlight 1, the first and second reflecting mirrors 4 and 5 are on the optical axis 11, the first focal point 23 on the side where the light source 2 is arranged, and the second on the side where the aperture 7 is arranged. The two focal points are determined by the elliptical shape of each reflecting mirror. Here, the first reflecting mirror 4 and the second reflecting mirror 5 have a common focal point on the optical axis 11, and the first and second focal points of the second reflecting mirror 5 a are respectively the first reflecting mirror 4. The first focal point 23 and the second focal point 71 coincide with each other, and the first and second focal points are set at the same position. The light source 2 is disposed so that the center of the filament 22 is located at the first focal point 23.

従って、光源２からの光が第１反射鏡４で反射された反射光２４と、漏れ光２６が第２反射鏡５で反射された反射光２５とは、アパーチャー７上の第２焦点７１に集光される。このとき、開口４２からの漏れ光２６は、光軸１１に近く、反射光の中でも最も中心照度に影響を与える光線である。このため、開口４２からの漏れ光２６が第２反射鏡５で反射されて、アパーチャー７に集光されることにより、従来、中心照度が低下していた照度分布特性を、図１の右側に示す照度分布特性２０のように、中心照度の低下を無くすことができ、光効率を高めることができる。なお、ここでの照度分布特性２０は光学系の構成に基づくシミュレーションのデータを示す。   Therefore, the reflected light 24 in which the light from the light source 2 is reflected by the first reflecting mirror 4 and the reflected light 25 in which the leakage light 26 is reflected by the second reflecting mirror 5 are reflected on the second focal point 71 on the aperture 7. Focused. At this time, the leaked light 26 from the opening 42 is a light beam that is close to the optical axis 11 and has the most influence on the central illuminance among the reflected light. For this reason, the leakage light 26 from the opening 42 is reflected by the second reflecting mirror 5 and condensed on the aperture 7, so that the illuminance distribution characteristic that has conventionally been reduced in central illuminance is shown on the right side of FIG. 1. Like the illuminance distribution characteristic 20 shown, a decrease in the central illuminance can be eliminated and the light efficiency can be increased. Here, the illuminance distribution characteristic 20 indicates simulation data based on the configuration of the optical system.

このように、本実施形態のスポットライト１によれば、第１反射鏡４の光源ソケット３に臨む面が開放された開口４２から漏れた光を第２反射鏡５で反射して集束レンズ９に到達させることができるので、照度分布特性２０における中心照度の低下を軽減し、光斑を無くし、光効率を高めることができる。また、第２反射鏡５の反射光による光効率の向上により、第１反射鏡４の開口４２を大きくできるので、光源取替えの際、取替え作業が容易になり、光源２の第１反射鏡４と接触による破損も低減できる。また、第１反射鏡４及び第２反射鏡５からの反射光を略同じ焦点位置に集光させることができるので、効率的に集束レンズ９へ到達する光を増やすことができ、照度分布特性２０の中心照度の低下をより軽減して、光効率を高めることができる。   As described above, according to the spotlight 1 of the present embodiment, the light that leaks from the opening 42 whose surface facing the light source socket 3 of the first reflecting mirror 4 is opened is reflected by the second reflecting mirror 5 and reflected by the focusing lens 9. Therefore, it is possible to reduce a decrease in central illuminance in the illuminance distribution characteristic 20, eliminate light spots, and increase light efficiency. Moreover, since the opening 42 of the 1st reflective mirror 4 can be enlarged by the improvement in the light efficiency by the reflected light of the 2nd reflective mirror 5, the replacement | exchange operation | work becomes easy at the time of light source replacement, and the 1st reflective mirror 4 of the light source 2 is sufficient. And damage due to contact can be reduced. Further, since the reflected light from the first reflecting mirror 4 and the second reflecting mirror 5 can be condensed at substantially the same focal position, the amount of light reaching the focusing lens 9 can be increased efficiently, and the illuminance distribution characteristic The reduction in the central illuminance of 20 can be further reduced and the light efficiency can be increased.

次に、本発明における第２の実施形態に係るスポットライトについて図２を参照して説明する。スポットライト１ａは、第２反射鏡５ａを第１反射鏡４に接するように配設し、光源ソケット３に固定した点が前記第１の実施形態と異なる。   Next, a spotlight according to a second embodiment of the present invention will be described with reference to FIG. The spotlight 1a is different from the first embodiment in that the second reflecting mirror 5a is disposed in contact with the first reflecting mirror 4 and is fixed to the light source socket 3.

本実施形態において、第２反射鏡５ａは、反射面５１と、その中心側の開口の背面側に形成した円筒台５３を有し、この円筒台５３をソケット部３１に外接して光源ソケット３に固定される。反射面５１は、前述と同様に、断面楕円の一部形状を有する。第２反射鏡５ａの第１焦点と第２焦点は、それぞれ第１反射鏡４の第１焦点２３と第２焦点７１とに一致している。従って、第１反射鏡４と第２反射鏡５ａとからの反射光は、第２焦点７１に集光され、集束レンズ９で屈折されて、照射光となる。このとき、第２反射鏡５ａの反射面５１が第１反射鏡４の開口４２に近いので、第２反射鏡５ａからの反射光が第１反射鏡４の裏面で反射されることが殆どなく、第２反射鏡５ａからの反射光を効率良くアパーチャー７側に反射することができる。   In the present embodiment, the second reflecting mirror 5a has a reflecting surface 51 and a cylindrical base 53 formed on the back side of the opening on the center side thereof. Fixed to. The reflection surface 51 has a partial shape of an elliptical cross section, as described above. The first focal point and the second focal point of the second reflecting mirror 5a coincide with the first focal point 23 and the second focal point 71 of the first reflecting mirror 4, respectively. Therefore, the reflected light from the first reflecting mirror 4 and the second reflecting mirror 5a is collected at the second focal point 71, refracted by the focusing lens 9, and becomes irradiation light. At this time, since the reflecting surface 51 of the second reflecting mirror 5a is close to the opening 42 of the first reflecting mirror 4, the reflected light from the second reflecting mirror 5a is hardly reflected by the back surface of the first reflecting mirror 4. The reflected light from the second reflecting mirror 5a can be efficiently reflected to the aperture 7 side.

第２反射鏡５ａは、耐温度の点で通常の樹脂に銀コーティングして反射面を形成するのではなく、例えば、反射面５１を形成する反射板を含む全体をアルミ部材で形成する。アルミ部材は、光の反射率が銀部材と比較して殆ど変わらず（例えば、銀反射率９７％、アルミ反射率９４％）、放熱性に優れている。従って、第２反射鏡５ａは、第１反射鏡４の開口４２を塞ぐことにより温度上昇があっても、放熱性が良いので、漏れ光の温度による影響を少なくして、漏れ光の反射量を高めることができ、上記の構成が可能となる。   The second reflecting mirror 5a does not form a reflecting surface by silver coating on ordinary resin in terms of temperature resistance. For example, the second reflecting mirror 5a is entirely formed of an aluminum member including a reflecting plate that forms the reflecting surface 51. The aluminum member has almost the same light reflectance as that of the silver member (for example, silver reflectance 97%, aluminum reflectance 94%), and is excellent in heat dissipation. Therefore, even if the second reflecting mirror 5a closes the opening 42 of the first reflecting mirror 4, even if the temperature rises, the second reflecting mirror 5a has good heat dissipation. Therefore, the influence of the temperature of the leaked light is reduced, and the reflected amount of the leaked light is reduced. The above-described configuration is possible.

このように、本実施形態のスポットライト１ａによれば、第２反射鏡５ａを第１反射鏡４に接するように配設したことにより、第２反射鏡５ａからの漏れ光２６の反射光が第１反射鏡４の裏面で反射される光量を低減することができ、光効率を高めることができる。   As described above, according to the spotlight 1a of the present embodiment, the second reflecting mirror 5a is disposed so as to be in contact with the first reflecting mirror 4, so that the reflected light of the leakage light 26 from the second reflecting mirror 5a is reflected. The amount of light reflected by the back surface of the first reflecting mirror 4 can be reduced, and the light efficiency can be increased.

次に、本発明における第３の実施形態に係るスポットライトについて図３を参照して説明する。スポットライト１ｂは、第２反射鏡５ｂを第１反射鏡４の第１焦点２３の近傍点を中心とする球面形状とした点が前記第１の実施形態と異なる。   Next, a spotlight according to a third embodiment of the present invention will be described with reference to FIG. The spotlight 1b is different from the first embodiment in that the second reflecting mirror 5b has a spherical shape centered on the vicinity of the first focal point 23 of the first reflecting mirror 4.

本実施形態において、第２反射鏡５ｂは、球面形状の反射面５４を有する。反射面５４は、第１焦点２３を中心とする球面形状を成すので、第１反射鏡４の開口４２からの漏れ光２６は、反射面５４で第１焦点２３に向けて反射される。従って、光源２からの直接光である漏れ光２６が第２反射鏡５ｂで反射された反射光は、直接光と略同じ光路で光源２のフィラメント２２近傍に戻され、光源２の光と共に再放射され、第１反射鏡４で反射されてアパーチャー７の第２焦点７１に集光され、集束レンズ９へ到達される。   In the present embodiment, the second reflecting mirror 5 b has a spherical reflecting surface 54. Since the reflecting surface 54 has a spherical shape centered on the first focal point 23, the leakage light 26 from the opening 42 of the first reflecting mirror 4 is reflected by the reflecting surface 54 toward the first focal point 23. Accordingly, the reflected light, which is the direct light from the light source 2, reflected by the second reflecting mirror 5 b is returned to the vicinity of the filament 22 of the light source 2 through the substantially same optical path as that of the direct light, and is regenerated together with the light from the light source 2. The light is emitted, reflected by the first reflecting mirror 4, collected at the second focal point 71 of the aperture 7, and reaches the focusing lens 9.

ここに、第２反射鏡５ｂの反射面５４は第１焦点２３から等距離の位置にある。従って、第２反射鏡５ｂからの反射光が、反射位置に関係なく略一様のレベルで第１反射鏡４の第１焦点２３に位置する光源２近傍に集光される。   Here, the reflecting surface 54 of the second reflecting mirror 5 b is at a position equidistant from the first focal point 23. Therefore, the reflected light from the second reflecting mirror 5b is condensed near the light source 2 located at the first focal point 23 of the first reflecting mirror 4 at a substantially uniform level regardless of the reflection position.

これにより、第２反射鏡５ｂからの一様レベルの反射光に基づいて、照度分布の中心付近で低減される照度を低減範囲に亘って略同じ反射光量で上昇させることができ、図３の右側に示すように、照度分布特性２０の中落ちを無くして照度レベルを一様にし、より滑らかにすることができる。また、例えば、光源２がフロストランプの場合は、光が拡散されるので、照射パターンの中心近傍から離れるに従ってなだらかに第２反射鏡５ｂからの反射光量を微増して、中落ちを無くし、照射パターンを滑らかにできる。   Thereby, based on the uniform reflected light from the second reflecting mirror 5b, the illuminance reduced near the center of the illuminance distribution can be increased with substantially the same amount of reflected light over the reduction range, as shown in FIG. As shown on the right side, the illuminance distribution characteristic 20 can be eliminated and the illuminance level can be made uniform and smoother. Further, for example, when the light source 2 is a frost lamp, the light is diffused. Therefore, the amount of light reflected from the second reflecting mirror 5b is slightly increased gradually away from the vicinity of the center of the irradiation pattern to eliminate the drop, and the irradiation is performed. The pattern can be smoothed.

なお、本発明は上記各種の実施形態の構成に限定されるものではなく、発明の趣旨を変更しない範囲で適宜に種々の変形が可能である。上記実施形態では、第１反射鏡と第２反射鏡の２つを用いたが、３つ以上の反射鏡を用いてもよい。また、反射鏡を金属部材で形成し、反射面の裏面側に凹凸を形成して放熱性を高めることもできる。また、反射鏡の楕円断面形状を１つの楕円曲線ではなく、複数の楕円曲線を結んだ曲線形状で形成し、又は、釣鐘形状とすることもできる。   In addition, this invention is not limited to the structure of said various embodiment, A various deformation | transformation is possible suitably in the range which does not change the meaning of invention. In the above embodiment, the first reflecting mirror and the second reflecting mirror are used, but three or more reflecting mirrors may be used. Moreover, a reflective mirror can be formed with a metal member, and unevenness | corrugation can be formed in the back surface side of a reflective surface, and heat dissipation can also be improved. Moreover, the elliptical cross-sectional shape of the reflecting mirror can be formed not by a single elliptic curve but by a curved shape connecting a plurality of elliptic curves, or by a bell shape.

本発明の第１の実施形態に係るスポットライトの側断面図。1 is a side sectional view of a spotlight according to a first embodiment of the present invention. 本発明の第２の実施形態に係るスポットライトの側断面図。The sectional side view of the spotlight which concerns on the 2nd Embodiment of this invention. 本発明の第３の実施形態に係るスポットライトの側断面図。The sectional side view of the spotlight which concerns on the 3rd Embodiment of this invention. 従来のスポットライトの側断面図。The side sectional view of the conventional spotlight. 従来の他のスポットライトの側断面図。The side sectional view of other conventional spotlights.

符号の説明Explanation of symbols

１、１ａ、１ｂ スポットライト
２ 光源
３ 光源ソケット
４ 第１反射鏡（反射鏡）
４１ 反射面
４２、４３ 開口
５、５ａ、５ｂ 第２反射鏡（反射鏡）
７ アパーチャー
２３ 第１焦点（焦点）
７１ 第２焦点（焦点） 1, 1a, 1b Spotlight 2 Light source 3 Light source socket 4 First reflecting mirror (reflecting mirror)
41 Reflecting surface 42, 43 Aperture 5, 5a, 5b Second reflecting mirror (reflecting mirror)
7 Aperture 23 First focus (focus)
71 Second focus (focus)

Claims (3)

光源ソケットに保持される光源と、前記光源からの光を反射する反射鏡と、前記反射鏡からの反射光を選択するアパーチャーと、前記アパーチャーから出力される通過光を屈折させる光学部材と、を備え、前記光源と反射鏡とアパーチャーと光学部材は共通の光軸上に配置されてなるスポットライトであって、
前記反射鏡は、第１反射鏡と第２反射鏡を有し、
前記第１反射鏡は、前記アパーチャーに臨む面と、前記光源ソケットに臨む面が開放され、光軸を軸とし、前記アパーチャー側に開口した断面略半楕円形の反射面を有し、
前記第２反射鏡は、前記光源ソケットに取り付けられていることを特徴とするスポットライト。 A light source held in a light source socket; a reflecting mirror that reflects light from the light source; an aperture that selects reflected light from the reflecting mirror; and an optical member that refracts the passing light output from the aperture. The light source, the reflector, the aperture, and the optical member are spotlights arranged on a common optical axis,
The reflecting mirror has a first reflecting mirror and a second reflecting mirror;
The first reflecting mirror has a reflective surface having a substantially semi-elliptical cross section that is open to the aperture side, with the surface facing the aperture and the surface facing the light source socket being open, with the optical axis as an axis,
The spotlight, wherein the second reflecting mirror is attached to the light source socket. 前記第２反射鏡は、前記第１反射鏡と共通の焦点を有する断面楕円の一部形状を有することを特徴とする請求項１に記載のスポットライト。   The spotlight according to claim 1, wherein the second reflecting mirror has a partial shape of a cross-sectional ellipse having a common focal point with the first reflecting mirror. 前記第２反射鏡は、前記第１反射鏡の焦点の近傍点を中心とする球面形状であることを特徴とする請求項１に記載のスポットライト。   2. The spotlight according to claim 1, wherein the second reflecting mirror has a spherical shape with a point near a focal point of the first reflecting mirror as a center.
JP2008276336A 2008-10-28 2008-10-28 Spotlight Expired - Fee Related JP5385587B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008276336A JP5385587B2 (en) 2008-10-28 2008-10-28 Spotlight

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008276336A JP5385587B2 (en) 2008-10-28 2008-10-28 Spotlight

Publications (2)

Publication Number Publication Date
JP2010108604A true JP2010108604A (en) 2010-05-13
JP5385587B2 JP5385587B2 (en) 2014-01-08

Family

ID=42297875

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008276336A Expired - Fee Related JP5385587B2 (en) 2008-10-28 2008-10-28 Spotlight

Country Status (1)

Country Link
JP (1) JP5385587B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013030444A (en) * 2011-07-29 2013-02-07 Sharp Corp Radiation device, light-emitting device, lighting apparatus, and vehicle headlight
CN105334705A (en) * 2014-08-05 2016-02-17 佳能株式会社 light source apparatus, illumination device, exposure apparatus, and device manufacturing method
KR101608156B1 (en) 2014-12-04 2016-04-01 영남대학교 산학협력단 Astral light for dental clinic

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05325602A (en) * 1992-05-15 1993-12-10 Yamagiwa Kk Movable reflecting mirror for luminaire
JPH06338209A (en) * 1993-05-27 1994-12-06 Alps Electric Co Ltd Illuminator
JP2002237202A (en) * 2001-02-07 2002-08-23 Phoenix Denki Kk Lamp with reflector
JP2004031056A (en) * 2002-06-25 2004-01-29 Matsushita Electric Works Ltd Spotlight
JP2004152629A (en) * 2002-10-30 2004-05-27 Matsushita Electric Works Ltd Lighting device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05325602A (en) * 1992-05-15 1993-12-10 Yamagiwa Kk Movable reflecting mirror for luminaire
JPH06338209A (en) * 1993-05-27 1994-12-06 Alps Electric Co Ltd Illuminator
JP2002237202A (en) * 2001-02-07 2002-08-23 Phoenix Denki Kk Lamp with reflector
JP2004031056A (en) * 2002-06-25 2004-01-29 Matsushita Electric Works Ltd Spotlight
JP2004152629A (en) * 2002-10-30 2004-05-27 Matsushita Electric Works Ltd Lighting device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013030444A (en) * 2011-07-29 2013-02-07 Sharp Corp Radiation device, light-emitting device, lighting apparatus, and vehicle headlight
WO2013018449A1 (en) * 2011-07-29 2013-02-07 シャープ株式会社 Radiating device, light-emitting device, illumination device, and vehicle headlight
CN105334705A (en) * 2014-08-05 2016-02-17 佳能株式会社 light source apparatus, illumination device, exposure apparatus, and device manufacturing method
US9772560B2 (en) 2014-08-05 2017-09-26 Canon Kabushiki Kaisha Light source apparatus, illumination device, exposure apparatus, and device manufacturing method
US10216092B2 (en) 2014-08-05 2019-02-26 Canon Kabushiki Kaisha Light source apparatus, illumination device, exposure apparatus, and device manufacturing method
KR101608156B1 (en) 2014-12-04 2016-04-01 영남대학교 산학협력단 Astral light for dental clinic

Also Published As

Publication number Publication date
JP5385587B2 (en) 2014-01-08

Similar Documents

Publication Publication Date Title
JP4792486B2 (en) Optical system for Fresnel lens light, especially spotlight or floodlight
US8591077B2 (en) Lens and lighting fixture utilizing the same
JP6654560B2 (en) Light source module and vehicle lamp
JP4410083B2 (en) Reflective light such as a built-in reflective light on the floor, ceiling or wall
JP5393018B2 (en) High efficiency LED optical device for automobile
US20050168995A1 (en) Fresnel lens spotlight with coupled variation of the spacing of lighting elements
US20090135606A1 (en) Multi-reflector mechanism for a led light source
CN108291702B (en) Light source device, lighting device, and vehicle lamp
JP2013130835A (en) Homogenizer, homogenizer device and illuminating device
JP2012059575A (en) Spotlight
WO2012141036A1 (en) Reflective type lighting device
JP2005183400A (en) Fresnel lens spot light
JP6461569B2 (en) Lighting device
JP5385587B2 (en) Spotlight
CN213237060U (en) Lighting device and lamp
JP3102988U (en) Light addition lighting device
JP2010044956A (en) Led bulb characterized by structure for irradiating single reflecting mirror (including convex mirror, spherical mirror, parabolic mirror and ellipsoidal mirror) with the light of several led
JP4199727B2 (en) Fresnel lens spotlight
JP2019050142A (en) Vehicular lighting fixture
JP4988538B2 (en) Spotlight
US20150308660A1 (en) Light engine device
JP5686039B2 (en) Vehicle lighting
JP2015207493A (en) LED light source device
JP2009245601A (en) Lighting fixture
TW201932993A (en) Light source device and exposure device comprising the same

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20111020

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20120112

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20121217

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20121225

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20130121

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20130514

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20130626

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20130924

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20131004

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees