TWI782827B - Projection lens for vehicle and projector for vehicle - Google Patents

Projection lens for vehicle and projector for vehicle Download PDF

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Publication number
TWI782827B
TWI782827B TW110147554A TW110147554A TWI782827B TW I782827 B TWI782827 B TW I782827B TW 110147554 A TW110147554 A TW 110147554A TW 110147554 A TW110147554 A TW 110147554A TW I782827 B TWI782827 B TW I782827B
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lens
vehicle
projection lens
vehicle projection
aperture
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TW110147554A
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Chinese (zh)
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TW202326025A (en
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陳時偉
李珈芸
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揚明光學股份有限公司
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Priority to TW110147554A priority Critical patent/TWI782827B/en
Priority to CN202211311918.9A priority patent/CN116266011A/en
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Publication of TW202326025A publication Critical patent/TW202326025A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/003—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having two lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2066—Reflectors in illumination beam
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lenses (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A projection lens for vehicle including a first lens and a second lens arranged sequentially from an magnifying side to a reducing side of the projection lens, and an aperture. The vehicle projection lens substantially includes the first lens and the second lens having refractive power. The first lens has positive refractive power. The aperture is disposed on the magnifying side of the second lens. In the two lenses, one of the lenses is made of glass and the other is made of non-glass. And in the two lenses, one is an aspheric lens. A vehicle projector is also provided.

Description

車用投影鏡頭及車用投影機Car projection lens and car projector

本發明是有關於一種光學鏡頭及投影機，且特別是有關於一種車用投影鏡頭及車用投影機。The present invention relates to an optical lens and a projector, and in particular to a vehicle projection lens and a vehicle projector.

為了達到行車安全目的，車用頭燈照明的亮度與光場分佈有一定的規範要求。一般光源，無論是鹵素燈、金屬燈、LED燈...等等，都無法直接投射使用，必須經過改變光場的步驟，才能滿足車用頭燈的照明要求。In order to achieve the purpose of driving safety, there are certain normative requirements for the brightness and light field distribution of vehicle headlight lighting. General light sources, whether it is halogen lamps, metal lamps, LED lights, etc., cannot be directly projected and used. Only by changing the light field can they meet the lighting requirements of vehicle headlights.

現行的車燈裝置，以非成像光學技術導引或調整來自光源的照明光束，以達到各國對於車頭燈的技術規範。如何適當調整車燈照明，提供適當的亮度與光場，達到安全駕駛以及預警行人的目的，是相當重要的課題。The current headlight device uses non-imaging optical technology to guide or adjust the illumination beam from the light source, so as to meet the technical specifications of various countries for headlights. How to properly adjust the lighting of car lights, provide appropriate brightness and light field, and achieve the purpose of safe driving and early warning of pedestrians is a very important issue.

本發明提供一種車用投影鏡頭及車用投影機，可具有較小的鏡頭體積，且可降低生產成本。The invention provides a vehicle projection lens and a vehicle projector, which can have a smaller lens size and can reduce production costs.

本發明實施例的一種車用投影鏡頭，包括自車用投影鏡頭的放大側到縮小側依序排列的第一透鏡與第二透鏡以及光圈。車用投影鏡頭實質由第一透鏡與第二透鏡等二片具有屈光度透鏡所組成。第一透鏡具有正屈光度。光圈設於第二透鏡的放大側。二片透鏡中，一者的材質為玻璃，另一者的材質為非玻璃。且二片透鏡中，一者為非球面透鏡。車用投影鏡頭的鏡頭總長度與光圈的直徑的比值介於0.8至1.4之間。A projection lens for a vehicle according to an embodiment of the present invention includes a first lens, a second lens, and an aperture arranged in sequence from the zoom-in side to the zoom-out side of the projection lens for a vehicle. The vehicle projection lens is essentially composed of two lenses with diopters, such as the first lens and the second lens. The first lens has positive diopter. The aperture is arranged on the magnification side of the second lens. Among the two lenses, one is made of glass, and the other is made of non-glass. And among the two lenses, one is an aspheric lens. The ratio of the total length of the lens to the diameter of the aperture of the projection lens for a vehicle is between 0.8 and 1.4.

本發明實施例的一種車用投影鏡頭，包括光圈、球面透鏡以及塑膠非球面透鏡。光圈數（f-number）小於或等於2.1。球面透鏡具有正屈光度。塑膠非球面透鏡具有正屈光度且為新月型透鏡。車用投影鏡頭的鏡頭總長度與光圈的直徑的比值介於0.8至1.4之間。車用投影鏡頭之透鏡數量實質上為二。A vehicle projection lens according to an embodiment of the present invention includes an aperture, a spherical lens, and a plastic aspheric lens. The aperture number (f-number) is less than or equal to 2.1. Spherical lenses have positive diopters. The plastic aspheric lens has positive diopter and is a crescent lens. The ratio of the total length of the lens to the diameter of the aperture of the projection lens for a vehicle is between 0.8 and 1.4. The number of lenses of the projection lens for a vehicle is essentially two.

本發明實施例的一種車用投影機，包括車用投影鏡頭、光源及光閥。第二透鏡設於第一透鏡及光閥之間。其中，光閥為數位微鏡裝置。第二透鏡與光閥的間距大於車用投影鏡頭的鏡頭總長度。第二透鏡與光閥的間距介於32毫米至45毫米間。第二透鏡與光閥的間距與車用投影鏡頭的鏡頭總長度的比值介於1.1至1.6之間。A vehicle projector according to an embodiment of the present invention includes a vehicle projection lens, a light source, and a light valve. The second lens is arranged between the first lens and the light valve. Wherein, the light valve is a digital micromirror device. The distance between the second lens and the light valve is greater than the total lens length of the vehicle projection lens. The distance between the second lens and the light valve is between 32mm and 45mm. The ratio of the distance between the second lens and the light valve to the total lens length of the vehicle projection lens is between 1.1 and 1.6.

基於上述，本發明實施例的車用投影鏡頭，在僅使用二片透鏡的情況下，即可提供所需的投影品質，達成投影效果。因此，可減小車用投影機及車用投影鏡頭的鏡頭體積，亦可降低生產成本。本發明實施例的車用投影機，可依靠成像光學，將光閥或光源的特殊光形分布，文字或符號投影在路面上，以達到法規需求以及使用者與路上行人的預警效果。Based on the above, the vehicle projection lens according to the embodiment of the present invention can provide the required projection quality and achieve the projection effect only by using two lenses. Therefore, the lens size of the vehicle projector and the vehicle projection lens can be reduced, and the production cost can also be reduced. The vehicle projector of the embodiment of the present invention can rely on imaging optics to project the special light shape distribution of the light valve or light source, characters or symbols on the road surface, so as to meet the legal requirements and the early warning effect of users and pedestrians on the road.

圖1為本發明的一實施例的車用投影機的示意圖。請參照圖1，車用投影機VP包括車用投影鏡頭10、光源20及光閥30。光源20可提供照明光束IL。光閥30配置於光源20的光路下游且將照明光束IL轉換為帶有影像資訊的影像光束IM。車用投影鏡頭10配置於光閥30的光路下游，將影像光束IM投射出車用投影機VP至投影目標（未顯示），例如是路面或牆面。FIG. 1 is a schematic diagram of a car projector according to an embodiment of the present invention. Referring to FIG. 1 , the vehicle projector VP includes a vehicle projection lens 10 , a light source 20 and a light valve 30 . The light source 20 may provide an illumination light beam IL. The light valve 30 is disposed downstream of the light path of the light source 20 and converts the illumination light beam IL into an image light beam IM with image information. The vehicle projection lens 10 is disposed downstream of the optical path of the light valve 30 , and projects the image beam IM out of the vehicle projector VP to a projection target (not shown), such as a road or a wall.

在本實施例中，光源20可例如是雷射、發光二極體、量子點發光二極體(QD-LED)、共振腔發光二極體(RC-LED)等。在本實施例中，光閥30可為數位微鏡裝置（Digital Micro-mirror Device，DMD）或液晶覆矽板(Liquid Crystal On Silicon panel，LCoS panel) 等反射式光閥，也可以為透光液晶面板(Transparent Liquid Crystal Panel)、電光調變器(Electro-Optical Modulator)、磁光調變器(Maganeto-Optic modulator)、聲光調變器(Acousto-Optic Modulator，AOM)等穿透式光閥。但本發明對光閥30的型態及其種類並不加以限制。In this embodiment, the light source 20 can be, for example, a laser, a light emitting diode, a quantum dot light emitting diode (QD-LED), a resonant cavity light emitting diode (RC-LED) and the like. In this embodiment, the light valve 30 can be a reflective light valve such as a Digital Micro-mirror Device (Digital Micro-mirror Device, DMD) or a Liquid Crystal On Silicon panel (LCoS panel), or it can be a light-transmitting light valve. Transparent Liquid Crystal Panel, Electro-Optical Modulator, Magneto-Optic Modulator, Acousto-Optic Modulator (AOM), etc. valve. However, the present invention does not limit the type and type of the light valve 30 .

本實施例的車用投影機VP，可使用數位光源處理技術（Digital Light Processing，DLP），利用成像光學將經過光閥30調製的特殊光形分布、文字或符號投影在路面或牆面等處所，以達到法規需求以及使用者與路上行人的預警效果。舉例而言，影像光束IM可以是光強度較大且不具特定圖案的光束，用以在駕駛行車時做為足夠亮度且符合規定的照明光。影像光束IM也可以依需求呈現具特定圖案的光束，例如是箭頭、方形、三角形、圓圈等幾何圖案，用以在駕駛行車時作為具提示用途的圖案或信號。本實施例的車用投影機VP可以應用作為裝設在汽車上的燈具，例如是遠光燈、近光燈、位置燈、剎車燈、倒車燈、尾燈、霧燈、牌照燈、日間行車燈與轉向燈等，本發明並不限於此。The vehicle projector VP of this embodiment can use digital light processing technology (Digital Light Processing, DLP), and use imaging optics to project the special light shape distribution, characters or symbols modulated by the light valve 30 on the road or wall. , in order to meet the requirements of regulations and the early warning effect of users and pedestrians on the road. For example, the image light beam IM may be a light beam with high light intensity and no specific pattern, which is used as illumination light with sufficient brightness and compliance with regulations when driving. The image light beam IM can also present a light beam with a specific pattern according to requirements, such as geometric patterns such as arrows, squares, triangles, circles, etc., which are used as patterns or signals for prompting when driving. The vehicle projector VP of this embodiment can be applied as lamps installed on automobiles, such as high beam, low beam, position lights, brake lights, reversing lights, tail lights, fog lights, license plate lights, daytime running lights, etc. Car lights and turn signals, etc., the present invention is not limited thereto.

圖2為本發明的第一實施例的車用投影鏡頭的示意圖。請參照圖2。車用投影鏡頭10配置於光閥30的光路下游。車用投影鏡頭10包括自車用投影鏡頭10的放大側A1到縮小側A2依序排列的第一透鏡1與第二透鏡2。光圈0設於第一透鏡1的縮小側A2，且設於第二透鏡2的放大側A1；換言之，光圈0設於第一透鏡1與第二透鏡2間。光圈0可以是獨立的遮光元件，因此光圈的直徑也可以是鏡筒內徑結構所形成的最小通光孔徑。FIG. 2 is a schematic diagram of a projection lens for a vehicle according to a first embodiment of the present invention. Please refer to Figure 2. The projection lens 10 for a vehicle is disposed downstream of the light path of the light valve 30 . The vehicle projection lens 10 includes a first lens 1 and a second lens 2 sequentially arranged from the enlargement side A1 to the reduction side A2 of the vehicle projection lens 10 . The aperture 0 is disposed on the reduction side A2 of the first lens 1 and is disposed on the enlargement side A1 of the second lens 2 ; in other words, the aperture 0 is disposed between the first lens 1 and the second lens 2 . The aperture 0 can be an independent shading element, so the diameter of the aperture can also be the minimum clear aperture formed by the inner diameter structure of the lens barrel.

在本實施例中，光閥30類似於圖1的車用投影機VP的光閥30。光閥30可自發光面EP發出影像光束。平板3可以為任何適合的透光材質的平板。平板3可調整投影裝置的長度，也可為光閥30提供保護，但本發明不限於此。第二透鏡2設於第一透鏡1及光閥30之間。自發光面EP發出的影像光束可先穿過平板3後進入車用投影鏡頭10，並依序經由第二透鏡2、光圈0、第一透鏡1向放大側A1投射。放大側A1是朝向投影目標的一側，而縮小側A2是朝向發光面EP的一側。In this embodiment, the light valve 30 is similar to the light valve 30 of the vehicle projector VP of FIG. 1 . The light valve 30 can emit image beams from the light emitting surface EP. The flat plate 3 can be any suitable light-transmitting flat plate. The flat plate 3 can adjust the length of the projection device, and can also provide protection for the light valve 30, but the present invention is not limited thereto. The second lens 2 is disposed between the first lens 1 and the light valve 30 . The image beam emitted from the light-emitting surface EP can first pass through the flat panel 3 and then enter the vehicle projection lens 10 , and then project to the magnifying side A1 through the second lens 2 , the aperture 0 , and the first lens 1 in sequence. The enlargement side A1 is the side facing the projection target, and the reduction side A2 is the side facing the light emitting surface EP.

在本實施例中，車用投影鏡頭10之透鏡數量實質上為二。第一透鏡1、第二透鏡2及平板3都各自具有一朝向縮小側A2且使影像光束通過的縮小側表面14、24、34，及一朝向放大側A1且使影像光束通過的放大側表面12、22、32。In this embodiment, the number of lenses of the vehicle projection lens 10 is substantially two. The first lens 1, the second lens 2 and the plate 3 each have a reduction side surface 14, 24, 34 facing the reduction side A2 and allowing the image beam to pass through, and a magnification side surface facing the magnification side A1 and allowing the image beam to pass 12, 22, 32.

詳細而言，在本實施例中，第一透鏡1為塑膠鏡片且為非球面透鏡。第一透鏡1具有正屈光度且為新月型透鏡，其中，第一透鏡1的放大側表面12為凸面，縮小側表面14為凹面。第一透鏡1的放大側表面12與縮小側表面14皆為非球面（aspheric surface），但本發明不以此為限。In detail, in this embodiment, the first lens 1 is a plastic lens and an aspherical lens. The first lens 1 has positive diopter and is a crescent lens, wherein the enlargement side surface 12 of the first lens 1 is convex, and the reduction side surface 14 is concave. Both the enlargement side surface 12 and the reduction side surface 14 of the first lens 1 are aspheric surfaces, but the present invention is not limited thereto.

第二透鏡2為玻璃鏡片且為球面透鏡。第二透鏡2具有正屈光度且為雙凸透鏡，其中第二透鏡2的放大側表面22為凸面，縮小側表面24為凸面。第二透鏡2的放大側表面22與縮小側表面24皆為球面（spheric surface），但本發明不以此為限。The second lens 2 is a glass lens and is a spherical lens. The second lens 2 has a positive diopter and is a biconvex lens, wherein the enlargement side surface 22 of the second lens 2 is convex, and the reduction side surface 24 is convex. Both the enlargement side surface 22 and the reduction side surface 24 of the second lens 2 are spherical surfaces, but the present invention is not limited thereto.

自另一觀點而言，車用投影鏡頭10包括光圈0、球面透鏡（即第二透鏡2）以及塑膠非球面透鏡（即第一透鏡1）。其中，球面透鏡具有正屈光度，塑膠非球面透鏡具有正屈光度且為新月型透鏡。其中新月型透鏡是指一側表面為凸面，另一側表面為凹面的透鏡。From another point of view, the vehicle projection lens 10 includes an aperture 0, a spherical lens (ie, the second lens 2 ), and a plastic aspheric lens (ie, the first lens 1 ). Among them, the spherical lens has a positive diopter, and the plastic aspheric lens has a positive diopter and is a crescent lens. The crescent lens refers to a lens with a convex surface on one side and a concave surface on the other side.

在本實施例中，車用投影鏡頭10實質由第一透鏡1與第二透鏡2等二片具有屈光度透鏡所組成。本發明第一實施例的車用投影鏡頭10的系統總長（TTL）為71.97毫米，光圈數（f-number）為1.68，鏡頭總長度（TL）為31.02毫米，鏡頭背焦（BFL）為40.95毫米。其中，系統總長（TTL）為第一透鏡1放大側表面12至車用投影鏡頭10的發光面EP在光軸I上的距離。鏡頭總長度（TL）為車用投影鏡頭10的二透鏡的最外側表面在光軸I上的距離；在本實施例中，為第一透鏡1放大側表面12至第二透鏡2的縮小側表面24在光軸I上的距離。鏡頭背焦（BFL）為車用投影鏡頭10第二透鏡2的縮小側表面24至光閥30的發光面EP在光軸I上的距離。In this embodiment, the vehicle projection lens 10 is substantially composed of two lenses with diopters, such as the first lens 1 and the second lens 2 . The total system length (TTL) of the vehicle projection lens 10 according to the first embodiment of the present invention is 71.97 mm, the aperture number (f-number) is 1.68, the total lens length (TL) is 31.02 mm, and the lens back focus (BFL) is 40.95 mm. mm. Wherein, the total system length (TTL) is the distance on the optical axis I from the enlarged side surface 12 of the first lens 1 to the light emitting surface EP of the vehicle projection lens 10 . The total lens length (TL) is the distance between the outermost surfaces of the two lenses of the vehicle projection lens 10 on the optical axis I; in this embodiment, it is the distance from the enlargement side surface 12 of the first lens 1 to the reduction side of the second lens 2 The distance of the surface 24 on the optical axis I. The lens back focus (BFL) is the distance on the optical axis I from the reduction side surface 24 of the second lens 2 of the vehicle projection lens 10 to the light emitting surface EP of the light valve 30 .

第一實施例的車用投影鏡頭10的其他詳細光學數據如下表1所示。其中，「間距/厚度」欄列出各表面之間的距離，該距離表示各透鏡或光學元件在光軸I上的厚度，或是各光學元件與下一光學元件的表面之間在光軸I上的距離。舉例來說，在列「12」中，「間距/厚度」表示第一透鏡1在光軸I上的厚度，而在列「14」中，「間距/厚度」表示第一透鏡1與第二透鏡2之間在光軸I上的距離，以此類推。「直徑」欄則列出光學元件的各表面的直徑。舉例來說，在列「12」中，「直徑」表示第一透鏡1的放大側表面12的直徑；而在列「14」中，「直徑」表示第一透鏡1的縮小側表面14的直徑，以此類推。本文中所述的「直徑」是指光學中心兩側的轉折點之間的距離。在本實施例中，第一透鏡1的放大側表面12的直徑，即為放大側表面12的曲面從光學中心往兩側透鏡邊緣延伸而發生轉折的轉折點P、Q之間的距離（請參考圖1）。此外，在「備註」欄中，除註記對應的光學元件之外，也標記了透鏡的型態。Other detailed optical data of the vehicle projection lens 10 of the first embodiment are shown in Table 1 below. Among them, the "pitch/thickness" column lists the distance between each surface, which represents the thickness of each lens or optical element on the optical axis I, or the distance between each optical element and the surface of the next optical element on the optical axis. distance on I. For example, in column "12", "pitch/thickness" indicates the thickness of the first lens 1 on the optical axis I, and in column "14", "pitch/thickness" indicates the distance between the first lens 1 and the second lens 1. The distance between the lenses 2 on the optical axis I, and so on. The "diameter" column lists the diameter of each surface of the optical element. For example, in column "12", "diameter" indicates the diameter of the enlargement side surface 12 of the first lens 1; and in column "14", "diameter" indicates the diameter of the reduction side surface 14 of the first lens 1 , and so on. "Diameter" as used herein refers to the distance between the turning points on either side of the optical center. In this embodiment, the diameter of the magnifying side surface 12 of the first lens 1 is the distance between the turning points P and Q where the curved surface of the magnifying side surface 12 extends from the optical center to the edges of the lenses on both sides and turns (please refer to figure 1). In addition, in the "Remarks" column, in addition to marking the corresponding optical components, the type of the lens is also marked.

表1 第一實施例 表面 編號 曲率 半徑 (mm) 間距/ 厚度 (mm) 折射率 阿貝數 直徑 (mm) 材質 備註 12 25.18 11.52 1.58 30.37 33.27 塑膠 第一透鏡1 (新月/非球面) 14 21.62 5 27.83   無限大 3     27.78   光圈0 22 156.64 11.5 1.73 54.68 29.4 玻璃 第二透鏡2 (雙凸) 24 -38.08 39.35 30.65 32 無限大 1.1 玻璃 平板3 34 無限大 0.5 EP 無限大   光閥30 Table 1 first embodiment surface number Radius of curvature (mm) Pitch/Thickness(mm) Refractive index Abbe number diameter (mm) material Remark 12 25.18 11.52 1.58 30.37 33.27 plastic First Lens 1 (Crescent/Asphere) 14 21.62 5 27.83 Unlimited 3 27.78 Aperture 0 twenty two 156.64 11.5 1.73 54.68 29.4 Glass Second lens 2 (bi-convex) twenty four -38.08 39.35 30.65 32 Unlimited 1.1 Glass Tablet 3 34 Unlimited 0.5 EP Unlimited light valve 30

在本實施例中，第一透鏡1的放大側表面12與縮小側表面14均是非球面，而這些非球面是依下列公式定義：

Figure 02_image001
……(1) 其中： R：透鏡表面近光軸I處的曲率半徑； Y：非球面曲面上的點與光軸I的垂直距離； Z：非球面之深度（非球面上距離光軸I為Y的點，其與相切於非球面光軸I上頂點之切面，兩者間的垂直距離）； K：圓錐係數（conic constant）； a 2i：第2i階非球面係數。 In this embodiment, both the enlargement side surface 12 and the reduction side surface 14 of the first lens 1 are aspheric surfaces, and these aspheric surfaces are defined according to the following formula:
Figure 02_image001
...(1) Among them: R: radius of curvature near the optical axis I of the lens surface; Y: vertical distance between a point on the aspheric surface and the optical axis I; Z: depth of the aspheric surface (distance from the optical axis I on the aspheric surface is the point of Y, and the tangent plane tangent to the apex on the aspheric optical axis I, the vertical distance between them); K: conic constant; a 2i : 2ith-order aspheric coefficient.

本實施例上述的各非球面表面在公式(1)中的圓錐係數以及各項非球面係數如表2中所示。其中，表2中欄位編號12表示其為第一透鏡1的放大側表面12的圓錐係數以及非球面係數，其它欄位依此類推。在本發明的各實施例中，各非球面表面在公式(1)中的第2階非球面係數（a 2）皆為0。 Table 2 shows the conic coefficients and various aspheric coefficients of the above-mentioned aspheric surfaces in the formula (1) in this embodiment. Wherein, the column number 12 in Table 2 indicates that it is the conic coefficient and the aspheric coefficient of the magnifying side surface 12 of the first lens 1 , and the other columns can be deduced by analogy. In each embodiment of the present invention, the second-order aspheric coefficients (a 2 ) of each aspheric surface in formula (1) are all zero.

表2 圓錐 係數 第4階 非球面係數 第6階 非球面係數 第8階 非球面係數 第10階 非球面係數 12 -0.58 2.29E-06 -9.07E-08 2.92E-10 -4.76E-13 14 -0.68 1.75E-05 -2.05E-07 6.58E-10 -8.70E-13 Table 2 Conic coefficient 4th order aspheric coefficient 6th order aspheric coefficient 8th order aspheric coefficient 10th order aspheric coefficient 12 -0.58 2.29E-06 -9.07E-08 2.92E-10 -4.76E-13 14 -0.68 1.75E-05 -2.05E-07 6.58E-10 -8.70E-13

據上所述，本實施例的車用投影鏡頭10符合以下條件：車用投影鏡頭10的二片透鏡中，一者的材質為玻璃（第二透鏡2），另一者的材質為非玻璃（第一透鏡1）；更具體而言，第一透鏡1的材質為塑膠。因此，車用投影鏡頭10可在提升成像品質的同時，降低製造成本。車用投影鏡頭10的二片透鏡中，一者為非球面透鏡（第一透鏡1）。此外，車用投影鏡頭10的光圈數（f-number）小於或等於2.1；鏡頭總長度TL小於35毫米，較佳為小於33毫米，更佳為小於31.5毫米。因此，車用投影鏡頭10的鏡頭長度可縮短。另外，本實施例的車用投影鏡頭10符合水平投影視角和垂直投影視角的比例介於2.5:1至6:1之間，以適合投射所欲呈現的影像；且車用投影鏡頭10不包括膠合透鏡。According to the above, the vehicle projection lens 10 of this embodiment meets the following conditions: among the two lenses of the vehicle projection lens 10, one is made of glass (the second lens 2), and the other is made of non-glass. (the first lens 1); more specifically, the material of the first lens 1 is plastic. Therefore, the vehicle projection lens 10 can reduce the manufacturing cost while improving the imaging quality. Among the two lenses of the projection lens 10 for a vehicle, one is an aspheric lens (the first lens 1 ). In addition, the f-number of the vehicle projection lens 10 is less than or equal to 2.1; the total lens length TL is less than 35 mm, preferably less than 33 mm, more preferably less than 31.5 mm. Therefore, the lens length of the projection lens 10 for a vehicle can be shortened. In addition, the vehicle projection lens 10 of this embodiment conforms to the ratio of the horizontal projection angle of view and the vertical projection angle of view between 2.5:1 and 6:1, so as to be suitable for projecting the image to be presented; and the vehicle projection lens 10 does not include cemented lens.

本實施例的車用投影鏡頭10可更符合以下條件：鏡頭總長度TL與光圈0的直徑的比值介於0.8至1.4之間，較佳地可介於0.85至1.35之間，更佳地可介於0.9至1.3之間。因此，車用投影鏡頭10可在光圈相同的情況下，縮短鏡頭長度。在本實施例中，鏡頭總長度TL與光圈0的直徑的比值為1.12。The vehicle projection lens 10 of this embodiment can better meet the following conditions: the ratio of the total lens length TL to the diameter of the aperture 0 is between 0.8 and 1.4, preferably between 0.85 and 1.35, and more preferably between 0.85 and 1.35. Between 0.9 and 1.3. Therefore, the projection lens 10 for vehicle can shorten the length of the lens under the condition of the same aperture. In this embodiment, the ratio of the total lens length TL to the diameter of the aperture 0 is 1.12.

本實施例的車用投影鏡頭10可更符合以下條件：鏡頭總長度TL與第一透鏡1的直徑D1的比值介於0.7至1之間；且鏡頭總長度TL與第一透鏡1和第二透鏡2中的直徑較大者的比值介於0.7至1之間；上述的比值較佳為介於0.75至0.95之間。其中，當第一透鏡1的放大側表面12的直徑與第一透鏡1的縮小側表面14的直徑不同時，以其中較大者為第一透鏡1的直徑D1。因此，車用投影鏡頭10可在第一透鏡的直徑相同的情況下，縮短鏡頭長度。在本實施例中，鏡頭總長度TL與第一透鏡1的直徑D1的比值為0.93。The vehicle projection lens 10 of the present embodiment can better meet the following conditions: the ratio of the total lens length TL to the diameter D1 of the first lens 1 is between 0.7 and 1; and the ratio of the total lens length TL to the first lens 1 and the second lens 1 The ratio of the larger diameter of the lens 2 is between 0.7 and 1; the above ratio is preferably between 0.75 and 0.95. Wherein, when the diameter of the enlargement side surface 12 of the first lens 1 is different from the diameter of the reduction side surface 14 of the first lens 1 , the larger one is taken as the diameter D1 of the first lens 1 . Therefore, the vehicle projection lens 10 can shorten the length of the first lens under the condition that the diameter of the first lens is the same. In this embodiment, the ratio of the total lens length TL to the diameter D1 of the first lens 1 is 0.93.

本實施例的車用投影鏡頭10可更符合以下條件：第二透鏡2與光閥30的間距（即鏡頭背焦，BFL）介於32毫米至45毫米間；較佳為介於34毫米至43毫米之間；更佳為介於35毫米至41毫米之間。在本實施例中，第二透鏡2與光閥30的間距BFL為40.95毫米。此外，第二透鏡2與光閥30的間距BFL大於車用投影鏡頭10的鏡頭總長度TL，且第二透鏡2與光閥30的間距BFL與車用投影鏡頭10的鏡頭總長度TL的比值介於1.1至1.6之間；較佳為介於1.2至1.5之間，更佳為介於1.3至1.4之間。在本實施例中，第二透鏡2與光閥30的間距BFL與車用投影鏡頭10的鏡頭總長度TL的比值為1.32。The vehicle projection lens 10 of this embodiment can better meet the following conditions: the distance between the second lens 2 and the light valve 30 (that is, the back focus of the lens, BFL) is between 32 mm and 45 mm; preferably between 34 mm and Between 43mm; more preferably between 35mm and 41mm. In this embodiment, the distance BFL between the second lens 2 and the light valve 30 is 40.95 millimeters. In addition, the distance BFL between the second lens 2 and the light valve 30 is greater than the total lens length TL of the vehicle projection lens 10, and the ratio of the distance BFL between the second lens 2 and the light valve 30 to the total lens length TL of the vehicle projection lens 10 is Between 1.1 and 1.6; preferably between 1.2 and 1.5, more preferably between 1.3 and 1.4. In this embodiment, the ratio of the distance BFL between the second lens 2 and the light valve 30 to the total lens length TL of the vehicle projection lens 10 is 1.32.

本實施例的車用投影鏡頭10可更符合以下條件：第一透鏡1與第二透鏡2的間距G12介於6毫米至11毫米之間，較佳為介於7毫米至10.5毫米之間、更佳為介於8毫米至10毫米之間；其中，第一透鏡1與第二透鏡2分別位於車用投影鏡頭10的最外側，第一透鏡1與第二透鏡2的間距G12為第一透鏡1的縮小側表面14到第二透鏡2的放大側表面22在光軸I上的距離。在本實施例中，第一透鏡1與第二透鏡2的間距G12為8毫米。此外，第一透鏡1與第二透鏡2的間距G12與車用投影鏡頭10的鏡頭總長度TL的比值介於0.2至0.45之間，較佳為介於0.25至0.4之間。在本實施例中，第一透鏡1與第二透鏡2的間距G12與車用投影鏡頭10的鏡頭總長度TL的比值為0.26。在其他實施例中，第一透鏡1與第二透鏡2的間距G12與車用投影鏡頭10的鏡頭總長度TL的比值可為介於0.35至0.4之間。The vehicle projection lens 10 of this embodiment can better meet the following conditions: the distance G12 between the first lens 1 and the second lens 2 is between 6 millimeters and 11 millimeters, preferably between 7 millimeters and 10.5 millimeters, More preferably between 8 millimeters to 10 millimeters; wherein, the first lens 1 and the second lens 2 are respectively located at the outermost sides of the vehicle projection lens 10, and the distance G12 between the first lens 1 and the second lens 2 is the first The distance on the optical axis I from the reduction-side surface 14 of the lens 1 to the enlargement-side surface 22 of the second lens 2 . In this embodiment, the distance G12 between the first lens 1 and the second lens 2 is 8 millimeters. In addition, the ratio of the distance G12 between the first lens 1 and the second lens 2 to the total lens length TL of the vehicle projection lens 10 is between 0.2 and 0.45, preferably between 0.25 and 0.4. In this embodiment, the ratio of the distance G12 between the first lens 1 and the second lens 2 to the total lens length TL of the vehicle projection lens 10 is 0.26. In other embodiments, the ratio of the distance G12 between the first lens 1 and the second lens 2 to the total lens length TL of the vehicle projection lens 10 may be between 0.35 and 0.4.

在本實施例中，光閥30可具有12.447毫米×6.226毫米的尺寸，以及1152×576畫素的解析度，且可具有10線對/毫米的空間頻率。本實施例的車用投影鏡頭10，在僅使用二片透鏡的情況下，即可達成所需的投影效果，而不需使用三片透鏡。舉例而言，本實施例的車用投影鏡頭10可搭配本實施例規格的光閥30使用，提供良好的投影品質，讓使用者或訊號的接收者可辨識所投影訊息。例如，在投影距離為10公尺或25公尺的狀況下，可將調製傳遞函數（Modulation Transfer Function，MTF）的量值控制在一定範圍內。如此，可減小車用投影機VP及車用投影鏡頭10的體積，亦可降低生產成本。In this embodiment, the light valve 30 may have a size of 12.447 mm×6.226 mm, a resolution of 1152×576 pixels, and a spatial frequency of 10 lp/mm. The vehicle projection lens 10 of this embodiment can achieve the required projection effect only by using two lenses, instead of using three lenses. For example, the vehicle projection lens 10 of this embodiment can be used with the light valve 30 of this embodiment to provide good projection quality, so that users or signal receivers can recognize the projected information. For example, when the projection distance is 10 meters or 25 meters, the magnitude of the modulation transfer function (Modulation Transfer Function, MTF) can be controlled within a certain range. In this way, the volume of the vehicle projector VP and the vehicle projection lens 10 can be reduced, and the production cost can also be reduced.

本實施例的車用投影鏡頭10的相關光學數值詳列於後附的表7中。The relevant optical values of the vehicle projection lens 10 of this embodiment are listed in Table 7 attached.

圖3為本發明的第二實施例的車用投影鏡頭的示意圖。請參照圖3。本實施例的車用投影鏡頭10與第一實施例大致相似，兩者的差異在於：第一透鏡1為玻璃鏡片且為球面透鏡，第二透鏡2為塑膠鏡片且為非球面透鏡；且，第二透鏡2為新月型透鏡，其中，第二透鏡2的放大側表面22為凹面，縮小側表面24為凸面。此外，第一透鏡1、第二透鏡2、平板3的各光學數據及各元件的間距等參數不完全相同。FIG. 3 is a schematic diagram of a projection lens for a vehicle according to a second embodiment of the present invention. Please refer to Figure 3. The vehicle projection lens 10 of this embodiment is roughly similar to the first embodiment, the difference between the two is that: the first lens 1 is a glass lens and is a spherical lens, and the second lens 2 is a plastic lens and is an aspheric lens; and, The second lens 2 is a crescent lens, wherein the enlargement side surface 22 of the second lens 2 is concave, and the reduction side surface 24 is convex. In addition, parameters such as the optical data of the first lens 1 , the second lens 2 , and the flat plate 3 and the distance between the elements are not completely the same.

本發明第二實施例的車用投影鏡頭10的系統總長（TTL）為60.19毫米，光圈數（f-number）為1.68，鏡頭總長度（TL）為25.15毫米，鏡頭背焦（BFL）為35.04毫米。本發明第二實施例的車用投影鏡頭10的其他詳細光學數據如下表3所示。The total system length (TTL) of the vehicle projection lens 10 according to the second embodiment of the present invention is 60.19 mm, the aperture number (f-number) is 1.68, the total lens length (TL) is 25.15 mm, and the lens back focus (BFL) is 35.04 mm. mm. Other detailed optical data of the vehicle projection lens 10 according to the second embodiment of the present invention are shown in Table 3 below.

表3 第二實施例 表面 編號 曲率 半徑 (mm) 間距/ 厚度 (mm) 折射率 阿貝數 直徑 (mm) 材質 備註 12 21.29 7.53 1.59 59.7 31.75 玻璃 第一透鏡1 (新月) 14 44.78 5 29.166   無限大 5     26.52   光圈0 22 -35.62 7.62 1.58 30.37 25.43 塑膠 第二透鏡2 (新月/非球面) 24 -26.32 33.44 25.39 32 無限大 1.1 玻璃 平板3 34 無限大 0.5 EP 無限大   光閥30 table 3 second embodiment surface number Radius of curvature (mm) Pitch/Thickness(mm) Refractive index Abbe number diameter (mm) material Remark 12 21.29 7.53 1.59 59.7 31.75 Glass First Lens 1 (Crescent Moon) 14 44.78 5 29.166 Unlimited 5 26.52 Aperture 0 twenty two -35.62 7.62 1.58 30.37 25.43 plastic Second Lens 2 (Crescent/Aspherical) twenty four -26.32 33.44 25.39 32 Unlimited 1.1 Glass Tablet 3 34 Unlimited 0.5 EP Unlimited light valve 30

本實施例的各非球面表面在上述的公式(1)中的圓錐係數以及各項非球面係數如表4中所示。Table 4 shows the conic coefficients and various aspheric coefficients of each aspheric surface in the above formula (1) in this embodiment.

表4 圓錐 係數 第4階 非球面係數 第6階 非球面係數 第8階 非球面係數 22 -30 -8.38E-05 3.81E-07 -5.70E-10 24 -1.51 9.12E-06 -3.13E-08 4.86E-10 Table 4 Conic coefficient 4th order aspheric coefficient 6th order aspheric coefficient 8th order aspheric coefficient twenty two -30 -8.38E-05 3.81E-07 -5.70E-10 twenty four -1.51 9.12E-06 -3.13E-08 4.86E-10

本實施例的車用投影鏡頭10的相關光學數值詳列於後附的表7中。The relevant optical values of the vehicle projection lens 10 of this embodiment are listed in Table 7 attached.

圖4為本發明的第三實施例的車用投影鏡頭的示意圖。請參照圖4。本實施例的車用投影鏡頭10與第一實施例大致相似，兩者的差異在於：第一透鏡1為玻璃鏡片且為球面透鏡，第二透鏡2為塑膠鏡片且為非球面透鏡；且，第一透鏡1為雙凸透鏡，第二透鏡2為新月型透鏡，其中，第二透鏡2的放大側表面22為凹面，縮小側表面24為凸面。此外，第一透鏡1、第二透鏡2、平板3的各光學數據及各元件的間距等參數不完全相同。FIG. 4 is a schematic diagram of a projection lens for a vehicle according to a third embodiment of the present invention. Please refer to Figure 4. The vehicle projection lens 10 of this embodiment is roughly similar to the first embodiment, the difference between the two is that: the first lens 1 is a glass lens and is a spherical lens, and the second lens 2 is a plastic lens and is an aspheric lens; and, The first lens 1 is a double-convex lens, and the second lens 2 is a crescent lens, wherein the enlargement side surface 22 of the second lens 2 is a concave surface, and the reduction side surface 24 is a convex surface. In addition, parameters such as the optical data of the first lens 1 , the second lens 2 , and the flat plate 3 and the distance between the elements are not completely the same.

本發明第三實施例的車用投影鏡頭10的系統總長（TTL）為61.61毫米，光圈數（f-number）為2，鏡頭總長度（TL）為25.81毫米，鏡頭背焦（BFL）為35.80毫米。本發明第三實施例的車用投影鏡頭10的其他詳細光學數據如下表5所示。The total system length (TTL) of the vehicle projection lens 10 according to the third embodiment of the present invention is 61.61 mm, the aperture number (f-number) is 2, the total lens length (TL) is 25.81 mm, and the lens back focus (BFL) is 35.80 mm. Other detailed optical data of the vehicle projection lens 10 according to the third embodiment of the present invention are shown in Table 5 below.

表5 第三實施例 表面 編號 曲率 半徑 (mm) 間距/ 厚度 (mm) 折射率 阿貝數 直徑 (mm) 材質 備註 12 26.9 7.9 1.5 81.55 27.86 玻璃 第一透鏡1 (雙凸) 14 -145.09 5 25.9   無限大 5     20.11   光圈0 22 -13.36 7.91 1.49 57.4 19.72 塑膠 第二透鏡2 (新月/非球面) 24 -14.83 34.2 21.68 32 無限大 1.1 玻璃 平板3 34 無限大 0.5 EP 無限大   光閥30 table 5 third embodiment surface number Radius of curvature (mm) Pitch/Thickness(mm) Refractive index Abbe number diameter (mm) material Remark 12 26.9 7.9 1.5 81.55 27.86 Glass First lens 1 (bi-convex) 14 -145.09 5 25.9 Unlimited 5 20.11 Aperture 0 twenty two -13.36 7.91 1.49 57.4 19.72 plastic Second Lens 2 (Crescent/Aspherical) twenty four -14.83 34.2 21.68 32 Unlimited 1.1 Glass Tablet 3 34 Unlimited 0.5 EP Unlimited light valve 30

本實施例的各非球面表面在上述的公式(1)中的圓錐係數以及各項非球面係數如表6中所示。Table 6 shows the conic coefficients and various aspheric coefficients of each aspheric surface in the above formula (1) in this embodiment.

表6 圓錐 係數 第4階 非球面係數 第6階 非球面係數 第8階 非球面係數 第10階 非球面係數 第12階 非球面係數 第14階 非球面係數 第16階 非球面係數 22 -9.96 -3.82E-04 5.27E-06 -4.48E-08 1.19E-10 1.33E-12 -1.15E-14 2.70E-17 24 -1.7 -2.08E-07 -4.28E-07 1.07E-08 -1.27E-10 9.90E-13 -5.34E-15 1.49E-17 Table 6 Conic coefficient 4th order aspheric coefficient 6th order aspheric coefficient 8th order aspheric coefficient 10th order aspheric coefficient 12th order aspheric coefficient 14th order aspheric coefficient 16th order aspheric coefficient twenty two -9.96 -3.82E-04 5.27E-06 -4.48E-08 1.19E-10 1.33E-12 -1.15E-14 2.70E-17 twenty four -1.7 -2.08E-07 -4.28E-07 1.07E-08 -1.27E-10 9.90E-13 -5.34E-15 1.49E-17

本實施例的車用投影鏡頭10的相關光學數值詳列於後附的表7中。The relevant optical values of the vehicle projection lens 10 of this embodiment are listed in Table 7 attached.

表7列出第一實施例至第三實施例的車用投影鏡頭10的相關光學數值。其中，列「TL」至列「G12」的各參數的單位為毫米（mm）。Table 7 lists the relative optical values of the vehicle projection lens 10 of the first to third embodiments. Wherein, the unit of each parameter in column "TL" to column "G12" is millimeter (mm).

表7 第一實施例 第二實施例 第三實施例 TL 31.02 25.15 25.81 BFL 40.95 35.04 35.80 D0 27.78 26.52 20.11 D1 33.27 31.75 27.86 G12 8 10 10 TL/D0 1.12 0.95 1.28 BFL/TL 1.32 1.39 1.39 TL/D1 0.93 0.79 0.93 G12/TL 0.26 0.40 0.39 Table 7 first embodiment second embodiment third embodiment TL 31.02 25.15 25.81 BFL 40.95 35.04 35.80 D0 27.78 26.52 20.11 D1 33.27 31.75 27.86 G12 8 10 10 TL/D0 1.12 0.95 1.28 BFL/TL 1.32 1.39 1.39 TL/D1 0.93 0.79 0.93 G12/TL 0.26 0.40 0.39

綜上所述，本發明實施例的車用投影鏡頭，在僅使用二片透鏡的情況下，即可提供所需的投影品質，達成投影效果。相較於使用三片透鏡的投影鏡頭，可減小車用投影機及車用投影鏡頭的體積，亦可降低生產成本。藉此，本發明實施例的車用投影機，可使用DLP技術，使用成像光學將特殊的光形分布，文字或符號投影在路面上，以達到法規需求以及使用者與路上行人的預警效果，且此種車用投影機具有較小的體積與較低的成本，更容易與各種車輛以及照明系統整合使用。To sum up, the vehicle projection lens according to the embodiment of the present invention can provide the required projection quality and achieve the projection effect only by using two lenses. Compared with the projection lens using three lenses, the volume of the car projector and the car projection lens can be reduced, and the production cost can also be reduced. In this way, the car projector of the embodiment of the present invention can use DLP technology and imaging optics to project special light shape distribution, characters or symbols on the road surface, so as to meet the requirements of regulations and the early warning effect of users and pedestrians on the road. Moreover, the vehicle projector has a smaller volume and lower cost, and is easier to be integrated with various vehicles and lighting systems.

0:光圈 1:第一透鏡 2:第二透鏡 3:平板 12、22、32:放大側表面 14、24、34:縮小側表面 10:車用投影鏡頭 20:光源 30:光閥 A1:放大側 A2:縮小側 EP:發光面 I:光軸 IM、IL:光束 P、Q:點 VP:車用投影機0: aperture 1: First lens 2: Second lens 3: Tablet 12, 22, 32: Zoom in on the side surface 14, 24, 34: Reduced side surface 10: Car projection lens 20: light source 30: light valve A1: Magnification side A2: Reduced side EP: luminous surface I: optical axis IM, IL: Beam P, Q: point VP: Car projector

圖1為本發明的一實施例的車用投影機的示意圖。 圖2為本發明的第一實施例的車用投影鏡頭的示意圖。 圖3為本發明的第二實施例的車用投影鏡頭的示意圖。 圖4為本發明的第三實施例的車用投影鏡頭的示意圖。 FIG. 1 is a schematic diagram of a car projector according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a projection lens for a vehicle according to a first embodiment of the present invention. FIG. 3 is a schematic diagram of a projection lens for a vehicle according to a second embodiment of the present invention. FIG. 4 is a schematic diagram of a projection lens for a vehicle according to a third embodiment of the present invention.

0:光圈 0: aperture

1:第一透鏡 1: First lens

2:第二透鏡 2: Second lens

3:平板 3: Tablet

12、22、32:放大側表面 12, 22, 32: Zoom in on the side surface

14、24、34:縮小側表面 14, 24, 34: Reduced side surface

10:車用投影鏡頭 10: Car projection lens

30:光閥 30: light valve

A1:放大側 A1: Magnification side

A2:縮小側 A2: Reduced side

EP:發光面 EP: luminous surface

I:光軸 I: optical axis

P、Q:點 P, Q: point

Claims (13)

一種車用投影鏡頭，包括： 自該車用投影鏡頭的放大側到縮小側依序排列的一第一透鏡與一第二透鏡，該車用投影鏡頭實質由該第一透鏡與該第二透鏡等二片具有屈光度透鏡所組成，該第一透鏡具有正屈光度；以及 一光圈，設於該第二透鏡的該放大側； 該二片透鏡中，一者的材質為玻璃，另一者的材質為非玻璃；且該二片透鏡中，一者為非球面透鏡； 且該車用投影鏡頭的鏡頭總長度與該光圈的直徑的比值介於0.8至1.4之間。 A projection lens for a vehicle, comprising: A first lens and a second lens are arranged sequentially from the enlargement side to the reduction side of the vehicle projection lens, and the vehicle projection lens is essentially composed of two diopter lenses such as the first lens and the second lens , the first lens has a positive diopter; and an aperture disposed on the magnifying side of the second lens; Among the two lenses, one is made of glass and the other is made of non-glass; and one of the two lenses is an aspherical lens; And the ratio of the total lens length of the vehicle projection lens to the diameter of the aperture is between 0.8 and 1.4. 如請求項1所述的車用投影鏡頭，其中該車用投影鏡頭的鏡頭總長度與該第一透鏡的直徑的比值介於0.7至1之間。The vehicle projection lens according to claim 1, wherein the ratio of the total lens length of the vehicle projection lens to the diameter of the first lens is between 0.7 and 1. 如請求項1所述的車用投影鏡頭，其中該光圈位於該第一透鏡的該縮小側。The vehicle projection lens as claimed in claim 1, wherein the aperture is located on the narrowing side of the first lens. 如請求項1所述的車用投影鏡頭，其中該光圈位於該第一透鏡與該第二透鏡間。The vehicle projection lens according to claim 1, wherein the aperture is located between the first lens and the second lens. 如請求項4所述的車用投影鏡頭，其中該第一透鏡與該第二透鏡的間距介於6毫米至11毫米之間。The vehicle projection lens according to claim 4, wherein the distance between the first lens and the second lens is between 6 mm and 11 mm. 如請求項5所述的車用投影鏡頭，其中該第一透鏡與該第二透鏡的間距與該車用投影鏡頭的鏡頭總長度的比值介於0.2至0.45之間。The vehicle projection lens according to claim 5, wherein the ratio of the distance between the first lens and the second lens to the total lens length of the vehicle projection lens is between 0.2 and 0.45. 如請求項1所述的車用投影鏡頭，其中該車用投影鏡頭的光圈數小於或等於2.1。The vehicle projection lens according to claim 1, wherein the f-number of the vehicle projection lens is less than or equal to 2.1. 一種車用投影鏡頭，包括： 一光圈，且光圈數（f-number）小於或等於2.1； 一球面透鏡，具有正屈光度；以及 一塑膠非球面透鏡，具有正屈光度且為新月型透鏡； 該車用投影鏡頭的鏡頭總長度與該光圈的直徑的比值介於0.8至1.4之間； 該車用投影鏡頭之透鏡數量實質上為二。 A projection lens for a vehicle, comprising: One aperture, and the aperture number (f-number) is less than or equal to 2.1; a spherical lens having positive power; and A plastic aspheric lens with positive diopter and a crescent lens; The ratio of the total lens length of the vehicle projection lens to the diameter of the aperture is between 0.8 and 1.4; The number of lenses of the projection lens for a vehicle is substantially two. 如請求項1或請求項8所述的車用投影鏡頭，其中該車用投影鏡頭的鏡頭總長度小於35毫米。The vehicle projection lens as described in claim 1 or claim 8, wherein the total lens length of the vehicle projection lens is less than 35 mm. 如請求項1或請求項8所述的車用投影鏡頭，其中該車用投影鏡頭不包括膠合透鏡。The vehicle projection lens according to claim 1 or claim 8, wherein the vehicle projection lens does not include a cemented lens. 如請求項1所述的車用投影鏡頭，其中該車用投影鏡頭的光圈數小於或等於2.1。The vehicle projection lens according to claim 1, wherein the f-number of the vehicle projection lens is less than or equal to 2.1. 如請求項1或請求項8所述的車用投影鏡頭，其中該車用投影鏡頭的水平投影視角和垂直投影視角的比例介於2.5:1至6:1之間。The vehicle projection lens according to claim 1 or claim 8, wherein the ratio of the horizontal projection angle to the vertical projection angle of the vehicle projection lens is between 2.5:1 and 6:1. 一種車用投影機，包括如請求項1所述的車用投影鏡頭， 且該車用投影機更包括一光源及一光閥，該第二透鏡設於該第一透鏡及該光閥之間； 其中，該光閥為一數位微鏡裝置； 該第二透鏡與該光閥的間距大於該車用投影鏡頭的鏡頭總長度； 該第二透鏡與該光閥的間距介於32毫米至45毫米間； 該第二透鏡與該光閥的間距與該車用投影鏡頭的鏡頭總長度的比值介於1.1至1.6之間。 A car projector, comprising the car projection lens as described in claim 1, And the car projector further includes a light source and a light valve, the second lens is arranged between the first lens and the light valve; Wherein, the light valve is a digital micromirror device; The distance between the second lens and the light valve is greater than the total lens length of the vehicle projection lens; The distance between the second lens and the light valve is between 32 mm and 45 mm; The ratio of the distance between the second lens and the light valve to the total lens length of the vehicle projection lens is between 1.1 and 1.6.
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TW202132849A (en) * 2020-02-27 2021-09-01 揚明光學股份有限公司 Lens and fabrication method thereof and vehicle lamp

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