CN102231039B - Projection means - Google Patents

Projection means Download PDF

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CN102231039B
CN102231039B CN 201110179252 CN201110179252A CN102231039B CN 102231039 B CN102231039 B CN 102231039B CN 201110179252 CN201110179252 CN 201110179252 CN 201110179252 A CN201110179252 A CN 201110179252A CN 102231039 B CN102231039 B CN 102231039B
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lens
projection
lenses
light valve
projection apparatus
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CN 201110179252
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Chinese (zh)
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CN102231039A (en )
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林明坤
吴宗训
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苏州佳世达光电有限公司
佳世达科技股份有限公司
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Abstract

本发明提供的投影装置包括影像产生装置以及投影镜头。 The projection apparatus according to the present invention comprises an image generating means and a projection lens. 投影镜头设于影像产生装置的光阀与投影幕之间,且投影镜头包括复数个镜片。 Image projection lens provided between the light valve and the projection screen generating means, and a plurality of lenses including a projection lens. 镜片包括第一镜片、第二镜片以及第三镜片,且第一镜片、第二镜片以及第三镜片为非球面镜片。 Lens comprises a first lens, a second lens and a third lens, and the first lens, second lens and the third lens are aspherical lenses. 投影镜头的有效焦距介于5mm与8mm之间,且投影镜头的有效焦距毫米值与镜片的数量的总和介于14与17之间。 The sum of the number of effective focal length of the projection lens is between 5mm and 8mm, and the projection lens with effective focal length of the lens millimeters value between 14 and 17. 通过本发明,可以使投影装置具有短焦距与大投影视角的效果,更可有效地降低投影装置的镜片数量,进而解决投影装置过重的问题。 By the present invention, the projection apparatus may have the effect of short focus and a large projection angle of view, but also effectively reduce the amount of lens projection apparatus, thereby solving the problem of excessive projection apparatus.

Description

投影装置 Projection means

技术领域 FIELD

[0001] 本发明关于一种投影装置,尤指一种具有至少三个非球面镜片的投影镜头的投影 [0001] The present invention relates to a projection apparatus, particularly to a projection having at least three aspheric lens of the projection lens

>JU ρςα装直。 > JU ρςα loaded straight.

背景技术 Background technique

[0002] 随着科技日新月异,投影装置在家庭、娱乐或商务用途上已逐渐扮演着不可或缺的角色。 [0002] With the advancement of technology, projection device in the family, entertainment or business purposes has gradually play an indispensable role. 传统投影装置是由影像产生装置以及投影镜头所组成,且影像产生装置产生影像藉由投影镜头放大且投射至投影幕上。 A conventional projection apparatus and a projection lens generating means is composed by the video, and the image generating means generates an image enlarged by the projection lens and projected onto the projection screen.

[0003] 由于以往制作投影镜头的镜片是采用球面设计,因此投影镜头中需使用许多镜片来解决像差与影像模糊失焦等问题,而造成投影镜头的尺寸以及重量受到限制。 [0003] Since the conventional production of the projection lens is a spherical lens design, the projection lens need to be used to solve many of the lens aberration and defocus problems such as image blur, caused by the projection lens size and weight is limited. 请参考图1,图I为习知投影镜头的示意图。 Please refer to FIG. 1, FIG. I is a schematic view of a conventional projection lens. 如图I所示,习知投影镜头10为了搭配使用(对角线)尺寸大于O. 4英寸以上的影像产生装置需使用十四个镜片12,来消除像差以及影像失真,并且各镜片12的镜面为球面镜面。 FIG I, the conventional projection lens 10 for use with the (diagonal) O. size greater than 4 inches above the image generating means need to use fourteen lens 12 to eliminate the aberration and image distortion, and each lens 12 It mirrors spherical mirror. 因此,在逐渐缩短焦距的情况下,投影镜头10的镜片12数量快速增加。 Thus, in a case where the focal length is gradually shortened, the number of the lens 12 of the projection lens 10 increases rapidly. 然而,随着投影装置朝向轻薄短小的趋势发展,投影镜头的镜片数量过多会造成投影装置的体积受到限制而无法缩小,且容易因投影装置的重量过重,而造成使用者的负担。 However, with the trend toward slim and light projection apparatus, the number of lenses of the projection lens will cause too much volume of the projection apparatus is limited and can not be reduced, and easily due to the weight of the heavy projection apparatus, the burden of the user.

[0004] 因此,提供同时具有大投影视角、小尺寸以及重量轻的特性的投影装置实为业界努力的目标。 [0004] Thus, while having a large projection angle, the projection apparatus small size and light weight characteristics of the industry real goal.

发明内容 SUMMARY

[0005] 本发明的主要目的在于提供一种投影装置,以改善因缩短焦距而造成投影装置重量过重的问题。 [0005] The main object of the present invention is to provide a projection apparatus, in order to improve the problems caused by the reduction of the focal length of the projection apparatus of the excessive weight.

[0006] 为达上述之目的,本发明提供一种投影装置,用于将影像投射至投影幕上。 [0006] To achieve the above object, the present invention provides a projection apparatus for projecting an image onto a projection screen. 投影装置包括影像产生装置以及投影镜头。 Generating means comprises an image projection apparatus and a projection lens. 影像产生装置用以产生具有影像的投射光,且影像产生装置具有光阀,使投射光从光阀射出。 Image generating means for generating projection light with the image, and the image generating means having a light valve, the projection light emitted from the light valve. 投影镜头设于光阀与投影幕之间,且投影镜头包括复数个镜片。 Projection lens provided between the light valve and the projection screen, and a projection lens comprising a plurality of lenses. 镜片具有光轴,且投射光经镜片于投影幕上产生投影影像,其中镜片包括第一镜片、第二镜片以及第三镜片,且第一镜片、第二镜片以及第三镜片为非球面镜片。 Lens having an optical axis, and lenses produced by the projection light projected image on the projection screen, which lens comprises a first lens, a second lens and a third lens, and the first lens, second lens and the third lens are aspherical lenses. 镜片满足第一关系式14 ( (EFL+N) ( 17以及第二关系式5彡EFL彡8,其中EFL为投影镜头的有效焦距毫米值,且N为镜片的数量。 A first lens satisfies the relationship of formula 14 ((EFL + N) (17 and the second relationship EFL San San 5 8, wherein the EFL is the effective focal length of the projection lens millimeters value, and N is the number of lenses.

[0007] 根据本发明所述的投影装置,投影影像的中心与光阀的中心分别位在光轴的两侧。 [0007] respectively located at both sides of the center axis of the projection apparatus according to the present invention, the center of the projected image of the light valve.

[0008] 根据本发明所述的投影装置,在该复数个镜片中,第一镜片为最邻近投影幕的镜片。 [0008] The projection apparatus according to the invention, in the plurality of lenses, the first lens is the lens most adjacent to the projection screen.

[0009] 根据本发明所述的投影装置,在该复数个镜片中,第二镜片为最邻近光阀的镜片。 [0009] The projection apparatus according to the present invention, the plurality of lenses in the second lens is the lens most adjacent to the light valve.

[0010] 根据本发明所述的投影装置还包括光栏,设置于第一镜片与第二镜片之间。 [0010] The projection apparatus according to the present invention further includes a diaphragm disposed between the first lens and the second lens. 进一步地,第三镜片设于该光栏与该第二镜片之间。 Further, a third lens disposed between the light field and the second lens. [0011] 根据本发明所述的投影装置,第一镜片、第二镜片以及第三镜片分别具有二个非球面镜面。 [0011] The projection apparatus according to the present invention, a first lens, a second lens and a third lens having two aspheric mirror surface, respectively.

[0012] 根据本发明所述的投影装置,光阀的对角线长度大于O. 4英寸(inch)。 [0012] The projection apparatus according to the present invention, the light valve diagonal is greater than O. 4 inch (inch).

[0013] 本发明的投影装置使用至少三个非球面镜片,使其有效焦距介于5mm与8mm之间,以具有短焦距与大投影视角的功效,并且本发明的投影装置的有效焦距与投影装置的镜片数量的总和介于14与17之间,使镜片数量限定于6至12个之间,更可有效地降低投影装置的镜片数量,进而解决投影装置过重的问题。 [0013] The projection apparatus according to the present invention is the use of at least three aspheric lens, so that the effective focal length range between 5mm and 8mm, having a short focal distance and a large effect of perspective projection, the projection and the effective focal length of the projection apparatus of the present invention. means the sum of the number of lenses is between 14 and 17, the number of lenses is defined between 6-12, more effective to reduce the number of the projection lens means, and further means to solve the problem of heavy projector.

附图说明 BRIEF DESCRIPTION

[0014] 图I为习知投影镜头的示意图。 [0014] Figure I is a schematic diagram of a conventional projection lens.

[0015] 图2为本发明的投影装置的示意图。 [0015] FIG. 2 is a schematic view of a projection apparatus of the present invention.

[0016] 图3为本发明一第一较佳实施例的投影镜头的示意图。 [0016] FIG. 3 is a schematic view of a projection lens of the first preferred embodiment of the present invention. · ·

[0017] 图4为本发明一第二较佳实施例的投影装置的示意图。 [0017] Fig 4 a schematic view of a projection apparatus of the second preferred embodiment of the present invention.

具体实施方式 detailed description

[0018] 为使对本发明的目的、构造、特征、及其功能有进一步的了解,兹配合实施例详细说明如下。 [0018] For further understanding of the object of the present invention, the structure, characteristics, and functions with the embodiment is hereby described in detail below.

[0019] 请参考图2,图2为本发明的投影装置的示意图。 [0019] Please refer to FIG. 2, FIG. 2 illustrates a projection apparatus of the present invention. 如图2所示,投影装置100用于将影像102投射至投影幕104上,且投影装置100包括影像产生装置106以及投影镜头108。 2, a projection apparatus 100 to the image 102 projected on a projection screen 104, and the projection apparatus 100 includes an image generating means 106 and a projection lens 108. 其中,影像产生装置106用于产生具有影像102的投射光。 Wherein the image generating means 106 for generating an image 102 having a projection light. 影像产生装置106具有光阀110,使投射光从光阀110射出。 Image generating means 106 having a light valve 110, light is emitted from the projection light valve 110. 本实施例的影像产生装置106可为包含光源、各式光学元件等的光机系统(light engine),且光阀可例如为液晶面板(IXD panel)、数位微镜元件(digital micro-mirror device,DMD),但本发明的影像产生装置与光阀不以此为限。 Image generating apparatus according to the present embodiment may include a light source 106, an optical element such as a variety of optical systems (light engine), and may be a liquid crystal light valve panel (IXD panel), digital micromirror device (digital micro-mirror device e.g. , DMD), but the present invention is an image generating means and the light valve is not limited thereto. 投影镜头108设置于投影幕104与光阀110之间,且包括复数个镜片,并具有光轴112,藉此从光阀110射出的投射光可藉由投影镜头108投射至投影幕104上,以于投影幕104上呈现出放大的投影影像114。 The projection lens 108 is disposed between the projection screen 104 and the light valve 110, and includes a plurality of lenses, and has an optical axis 112, whereby the light may be projected onto the projection screen 108 by a projection lens 104 projecting light emitted from the light valve 110, to present an enlarged projected image on a projection screen 114 to 104. 并且,投影镜头108具有有效焦距,满足第一关系式14彡(EFL+N) ( 17以及第二关系式5彡EFL彡8,其中EFL为投影镜头的有效焦距毫米值(即单位mm前的数值),且N为镜片的数量。换句话说,镜片的数量介于6至12个之间。由此可知,本发明的投影装置100采用一次成像的方式将倒立的影像102成像至投影幕104上,而形成正立且放大的投影影像114。并且,投影影像114的中心与光阀110的中心分别位在光轴112的两侦U。此外,光阀的对角线长度约略大于O. 4英寸(inch)。 Further, the projection lens has an effective focal length of 108, 14 San satisfy the first relational formula (EFL + N) (17 and the second relationship EFL San San 5 8, wherein the effective focal length EFL value mm of the projection lens (i.e., front in mm values), and N is the number of lenses. in other words, the number of lenses between 6-12. It can be seen using an imaging manner, the projection apparatus 100 according to the present invention, the image forming inverted images to the projection screen 102 the 104, and is formed upright an enlarged projected image 114. Further, the center of the projected image 114 and the center of the light valve 110 are respectively located in the two U. Further investigation of the optical axis 112, the light valve diagonal length slightly larger than O . 4 inches (inch).

[0020] 为了清楚说明本发明的投影镜头,请参考图3,且一并参考图2。 [0020] To clearly illustrate the projection lens of the present invention, please refer to FIG. 3 and refer to FIG. 2. 图3为本发明一第一较佳实施例的投影镜头的示意图。 FIG 3 is a schematic of a projection lens of the first preferred embodiment of the present invention. 如图3所示,本实施例的镜片可区分为第一镜片LU、第二镜片L12、第三镜片L13、第四镜片L14、第五镜片L15、第六镜片L16、第七镜片L17以及第八镜片L18,其中第一镜片L11、第二镜片L12以及第三镜片L13为非球面镜片,且第四镜片L14、第五镜片L15、第六镜片L16、第七镜片L17以及第八镜片L18为球面镜片。 3, the present embodiment the lens area may be divided into a first embodiment of the lens LU, a second lens L12, a third lens L13, the fourth lens L14, the fifth lens L15, a lens L16 sixth, seventh lens L17 and the second eight lenses L18, wherein the first lens L11, a second lens L12 and the third lens L13 are aspherical lenses, and the fourth lens L14, the fifth lens L15, a lens L16 sixth, seventh and eighth lens L17 to the lens L18 spherical lenses. 此等透镜从邻近投影幕104的一侧至邻近光阀110的一侧的顺序依序为第一镜片LU、第四镜片L14、第五镜片L15、第六镜片L16、第三镜片L13、第七镜片L17、第八镜片L18以及第二镜片L12,亦即第一镜片Lll为此等镜片中最邻近投影幕104者,且第二镜片L12为此等镜片中最邻近光阀110者。 Such a lens order from the side adjacent the projection screen adjacent to the light valve 104 to a side 110 of the first lens sequentially LU, the fourth lens L14, the fifth lens L15, a sixth lens L16, a third lens L13, the second seven lenses L17, L18 eighth lens and a second lens L12, i.e., a first lens and other lenses for this Lll Closest projection screen 104 by, a second lens L12 and the lens, etc. For this purpose the most adjacent to the light valve 110 persons. 另外,投影镜头108另包括光栏116,设于第六镜片L16与第三镜片L13之间,且光栏116与第六镜片L16的间距大于光栏116与第三镜片L13的间距。 Further, the projection lens 108 further comprises a diaphragm 116, disposed between the sixth lens L16 and the third lens L13, and the light bar 116 and the sixth lens L16 and L13 is greater than the spacing pitch of the light bar 116 and the third lens. 其中,第三镜片L13为非球面镜片中最邻近光栏116之一者。 Wherein the third lens L13 are aspherical lens most adjacent to the diaphragm 116 by one. 于本实施例中,第一镜片Lll为凸凹透镜,且具有面对投影幕104的凸镜面Sll与面对光阀110的凹镜面S12。 In the present embodiment, the first lens is a meniscus lens Lll, and the face of the projection screen 104 having a convex mirror surface facing the light valve Sll concave mirror 110 in S12. 第二镜片L12为双凸透镜,且具有面对投影幕104的凸镜面S13以及面对光阀110的凸镜面S14。 A second lens L12 is a biconvex lens, a mirror and a convex face S13 projection screen 104 and convex mirror 110 faces the light valve of S14. 第三镜片L13为凹凸透镜,且具有面对投影幕104的凹镜面S15以及面对光阀110的凸镜面S16。 The third lens is a meniscus lens L13 and having a concave face mirror 104 of the projection screen facing the light valve S15 and the convex mirror surface 110 S16. 第四镜片L14为双凹透镜,且具有面对投影幕104的凹镜面S17以及面对光阀110的凹镜面S18。 The fourth lens L14 is a biconcave lens, and a concave mirror 104 facing the projection screen facing the light valve S17 and the concave mirror 110 S18. 第五镜片L15为双凸透镜,且具有面对投影幕104的凸镜面S19以及面对光阀110的凸镜面S110。 The fifth lens is a biconvex lens L15, and S19 a mirror having a convex face facing the projection screen 104 and a light valve of the convex mirror S110 110. 第六镜片L16为凸凹透镜,且具有面对投影幕104的凸镜面Slll以及面对光阀Iio的凹镜面S112。 The sixth lens is a meniscus lens L16 and having a convex face mirror Slll projection screen 104 and a light valve facing the concave mirror Iio S112. 第七镜片L17为双凸透镜,且具有面对投影幕104的凸镜面 The seventh lens L17 is a biconvex lens, a mirror and a convex face of the projection screen 104

S113以及面对光阀110的凸镜面S114。 S113 and convex mirror surface facing the light valve 110 S114. 第八镜片L18为双凹透镜,且具有面对投影幕104的凹镜面S115以及面对光阀110的凹镜面S116,其中第八镜片L18的凹镜面S115与第七镜片L17面对光阀110的凸镜面S114重合,而具有相同的曲率半径。 The eighth lens L18 is a biconcave lens, and a projection screen having facing concave mirror 104 faces the light valve S115 and S116 concave mirror 110, wherein the eighth lens L18 with a concave mirror S115 seventh lens L17 facing the light valve 110 S114 coincides convex mirror, having the same radius of curvature. 并且,本实施例的第一镜片Lll至第八镜片L18由塑胶所构成,且其镜面的光学资料与配置关系列举于表I中,但本发明并不以此为限。 And, a first lens of the present embodiment to eighth embodiment Lll lens L18 constituted by plastic, and the relationship between the optical mirror configuration data listed in Table I, but the present invention is not limited thereto. 于表I中,「厚度」的值代表对应此列的表面至下一列的表面的距离,即此列的镜面与下一列的镜面的间距。 In Table I, represents the "thickness" corresponding to the distance from the surface of the surface of this column to the next column, the pitch of the mirror and the mirror next column, i.e. the column.

[0021]表 I [0021] TABLE I

[0022] [0022]

Figure CN102231039BD00061

[0023] 并且,第一镜片Lll的凸镜面Sll与凹镜面S12、第二镜片L12的二凸镜面S13、S14 [0023] Further, the first lens Lll convex mirror and the concave mirror Sll S12, a second lens L12 are two convex mirror S13, S14

以及第三镜片L13的凹镜面S15以及凸镜面S16皆为非球面镜面,且非球面镜面的表面多 And a third lens L13 a concave mirror and a convex mirror S15 S16 are aspheric mirror surface, and the aspherical mirror surface of the multi

项式可表示为: Polynomial can be expressed as:

Figure CN102231039BD00062

[0025] 其中z为非球面镜面的凹陷度(sag) , r为非球面镜面的孔径半径,a为非球面镜面顶点处的曲率半径,b为圆锥系数,以及c、d、e、f为分别为四阶、六阶、八阶以及十阶的非球面系数。 [0025] wherein z is non recess a spherical mirror (sag), r the radius of the aperture aspheric mirror surface, a radius of curvature at the apex of the aspherical mirror surface, b is a conical coefficient, and c, d, e, f is respectively, fourth-order, sixth-order, eighth-order and tenth-order aspheric coefficients of. 本实施例的第一镜片Lll的凸镜面Sll与凹镜面S12、第二镜片L12的二凸镜面S13、S14以及第三镜片L13的凹镜面S15以及凸镜面S16的非球面系数列举于表2中(数值以科学计数的格式表示),但本发明并不以此为限。 Lll first lens convex mirror and the concave mirror S12 Sll embodiment according to the present embodiment, the second mirror convex lens L12 dicarboxylic S13, S14 of the lens L13 and the third concave mirror and a convex aspherical surface coefficients S15 S16 mirror listed in Table 2 (values ​​are expressed in scientific notation format), but the present invention is not limited thereto.

[0026]表 2 [0026] TABLE 2

[0027] [0027]

Figure CN102231039BD00071

[0028] 由上述资料可知,本实施例的投影镜头108的有效焦距约略为6. 95mm(EFL为 [0028] From the above data, the projection lens of the present embodiment is effective focal length of roughly 108 6. 95mm (EFL is

6. 95),且投影镜头108的投影视角约略为60度。 Perspective projection 6.95), and the projection lens 108 is roughly 60 degrees. 并且,本实施例的投影镜头108仅使用三个非球面镜片即可具有有效焦距介于5mm与8mm之间的功效,且投影镜头108的镜片的总数量仅为八片,因此不仅具有短焦距的功效,更可降低投影镜头108的镜片数量,以减少投影镜头108的整体重量。 Further, the projection lens 108 of the present embodiment uses only three aspherical lens having an effective focal length can be interposed between the efficacy of 5mm and 8mm, and the total number of lenses of the projection lens 108 only eight, thus having only a short focal length effect, but also reduce the number of lenses of the projection lens 108 to reduce the overall weight of the projection lens 108.

[0029] 此外,本发明的投影镜头并不以上述实施例为限。 [0029] Further, the projection lens of the present invention is not limited to the embodiments described above. 请参考图4,图4为本发明一第二较佳实施例的投影装置的示意图。 Please refer to FIG 4, which illustrates a schematic view of a projection apparatus of the present invention a second preferred embodiment of the present embodiment. 如图4所示,本实施例的投影镜头200的镜片可区分为第一镜片L21、第二镜片L22、第三镜片L23、第四镜片L24、第五镜片L25、第六镜片L26、第七镜片L27、第八镜片L28、第九镜片L29、第十镜片L210以及第i^一镜片L211,其中第一镜片L21、第二镜片L22以及第三镜片L23为非球面镜片,且第四镜片L24、第五镜片L25、第六镜片L26、第七镜片L27、第八镜片L28、第九镜片L29、第十镜片L210以及第i^一镜片L211为球面镜片。 4, the projection lens of the present embodiment, lens 200 may be divided into a first region of a lens L21, a second lens L22, a third lens L23, the fourth lens L24, a lens L25, the fifth, the sixth lens L26, a seventh lens L27, a lens L28 eighth, ninth lenses L29, L210 and a tenth lens of a lens L211 i ^, wherein a first lens L21, a second lens L22 and the third lens L23 are aspherical lenses, and the fourth lens L24 , a lens L25, the fifth, the sixth lens L26, a lens L27 seventh, eighth lens L28, a lens L29 ninth, tenth lens L210 and L211 of i ^ a lens is a spherical lens. 本实施例的镜片从邻近投影幕104的一侧至邻近光阀110的一侧的顺序依序为第一镜片L21、第四镜片L24、第五镜片L25、第六镜片L26、第七镜片L27、第八镜片L28、第三镜片L23、第九镜片L29、第十镜片L210、第i^一镜片L211以及第二镜片L22。 Lens of this embodiment the order from a side adjacent to the projection screen 104 adjacent the side 110 of the light valve sequentially to a first lens L21, the fourth lens L24, the fifth lens L25, a sixth lens L26, a seventh lens L27 , an eighth lens L28, a third lens L23, the lens L29 of the ninth, tenth lens L210, L211 of the i ^ a lens and a second lens L22. 第一镜片L21为此等镜片中最邻近投影幕104者,且第二镜片L22为此等镜片中最邻近光阀110者。 To this end a first lens L21 and the like of the lens 104 by the most adjacent to the projection screen, a second lens L22 and the other lens for this nearest light valve 110 persons. 另外,投影镜头200的光栏116设于第七镜片L27与第八镜片L28之间,且光栏116与第七镜片L27的间距大于光栏116与第八镜片L28的间距。 Further, the projection lens 200, diaphragm 116 is provided between the seventh and the eighth lens L27 lens L28, and the diaphragm 116 and the seventh lens L27 is greater than the spacing distance L28 diaphragm 116 and the eighth lens. 其中,第三镜片L23为非球面镜片中最邻近光栏116者。 Wherein the third lens L23 are aspherical lens most adjacent to the light bar 116 persons. 此外,本实施例的第一镜片L21为凸凹透镜,且具有面对投影幕104的凸镜面S21与面对光阀110的凹镜面S22。 Further, the first lens L21 of the present embodiment is a meniscus lens and having a convex face of the projection screen 104 facing the mirror surface S21 concave mirror 110 of the light valve S22. 第二镜片L22为双凸透镜,且具有面对投影幕104的凸镜面S23以及面对光阀110的凸镜面S24。 A second lens L22 is a biconvex lens, a mirror and a convex face S23 projection screen 104 and convex mirror 110 faces the light valve of S24. 第三镜片L23为双凸透镜,且具有面对投影幕104的凸镜面S25以及面对光阀110的凸镜面S26。 The third lens L23 is a biconvex lens, a mirror and a convex face S25 projection screen 104 and convex mirror 110 faces the light valve of S26. 第四镜片L24为凸凹透镜,且具有面对投影幕104的凸镜面S27以及面对光阀110的凹镜面S28。 The fourth lens is a meniscus lens L24 and having a convex mirror surface facing the projection screen 104 facing the light valve S27 and the concave mirror 110 S28. 第五镜片L25为双凹透镜,且具有面对投影幕104的凹镜面S29以及面对光阀110的凹镜面S210。 The fifth lens is a biconcave lens L25, and a light valve having a concave mirror surface facing the concave mirror surface facing S29 S210 projection screen 104, and 110. 第六镜片L26为双凸透镜,且具有面对投影幕104的凸镜面S211以及面对光阀110的凸镜面S212。 The sixth lens L26 is a biconvex lens, a mirror and a convex face having a projection screen 104 and S211 convex mirror surface facing the light valve 110 S212. 第七镜片L27为凸凹透镜,且具有面对投影幕104的凸镜面S213以及面对光阀110的凹镜面S214。 The seventh lens L27 is a convex-concave lens, a mirror and a convex face S213 projection screen 104 and a light valve facing the concave mirror S214 110. 第八镜片L28为双凹透镜,且具有面对投影幕104的凹镜面S215以及面对光阀110的凹镜面S216。 The eighth lens L28 of a biconcave lens and having a concave face mirror 104 and a projection screen S215 facing the concave mirror light valve 110 S216. 第九镜片L29为双凹透镜,且具有面对投影幕104的凹镜面S217以及面对光阀Iio的凹镜面S218。 The ninth lens L29 is a biconcave lens, and a concave mirror and having a face S217 Iio light valve projection screen facing the concave mirror 104 in S218. 第十镜片L210为双凸透镜,且具有面对投影幕104的凸镜面S219以及面对光阀110的凸镜面S220。 X is a biconvex lens L210, and a convex face mirror S219 projection screen 104 and the convex mirror surface facing the light valve of S220 110. 第H^一镜片L211为凹平透镜,且具有面对投影幕104的凹镜面S221以及面对光阀110的平坦镜面S222,其中第i^一镜片L211的凹镜面S221与第十镜片L210面对光阀110的凸镜面S220重合,而具有相同的曲率半径。 H ^ a first lens flat concave lens L211, and a projection screen having facing concave mirror 104 faces the light valve S221 and S222 110 of the flat mirror, wherein the first lens L211 i ^ a concave mirror surface S221 and the tenth lens L210 convex mirror light valve 110 coincides S220, and having the same radius of curvature. 并且,本实施例的第一镜片L21至第十一镜片L211的镜面的光学资料与配置关系列举于表3中,但本发明并不以此为限。 And, a first lens of the present embodiment to the eleventh embodiment of a lens L21 L211 optical mirror arrangement relationship data and listed in Table 3, but the present invention is not limited thereto. 于表3中,「厚度」的值代表对应此列的表面至下一列的表面的距离,即此列的镜面与下一列的镜面的间距。 In Table 3, represents the "thickness" corresponding to the distance from the surface of the surface of this column to the next column, the pitch of the mirror and the mirror next column, i.e. the column.

[0030] 表3 [0030] TABLE 3

[0031] [0031]

Figure CN102231039BD00081

[0032] [0032]

Figure CN102231039BD00091

[0033] 并且,本实施例的第一镜片L21的凸镜面S21与凹镜面S22、第二镜片L22的二凸镜面S23、S24以及第三镜片L23的二凸镜面S25、S26亦为非球面镜面,且根据上述的表面多项式,本实施例的第一镜片L21的凸镜面S21与凹镜面S22、第二镜片L22的二凸镜面S23、S24以及第三镜片L23的二凸镜面S25、S26的非球面系数可列举于表4中(数值以科学计数的格式表示),但本发明并不以此为限。 [0033] Further, the first lens L21 is a convex mirror of the present embodiment is a concave mirror S22 and S21, a second lens L22, two convex mirror S23, S24 of the lens L23 and the third convex mirror dicarboxylic S25, S26 also aspheric mirror and a surface of the above polynomial, of the first lens L21 is a convex mirror of the present embodiment is a concave mirror S22 and S21, a second lens L22, two convex mirror S23, S24 of the lens L23 and the third convex mirror dicarboxylic S25, S26, non- aspherical coefficient mentioned in table 4 (the values ​​are expressed in scientific notation format), but the present invention is not limited thereto.

[0034]表 4 [0034] TABLE 4

[0035] [0035]

Figure CN102231039BD00101

[0036] 根据上述资料,本实施例的投影镜头200的有效焦距系约略为5. 22mm(EFL为 [0036] According to the above information, the present embodiment of the projection lens system effective focal length of roughly 200 5. 22mm (EFL is

5. 22),且投影镜头200的投影视角约略为67. 2度。 Perspective projection 5.22), and the approximate projection lens 200 is 67.2 degrees. 并且,本实施例的投影镜头200仅使用三个非球面镜片即可具有有效焦距介于5mm与8mm之间的功效,且投影镜头200的镜片的总数量仅为十一片,因此不仅可藉由缩短焦距来以提升投影镜头200的投影视角,更可避免过度增加投影镜头200的整体重量。 Further, the projection lens 200 of the present embodiment uses only three aspherical lens can have efficacy between the effective focal length of between 5mm and 8mm, and the total number of lenses of the projection lens 200 only eleven, so not only by shortening the focal length of the projection to improve angle projection lens 200, but also to avoid excessive increase in the overall weight of the projection lens 200.

[0037] 综上所述,本发明的投影装置使用至少三个非球面镜片,使其有效焦距介于5mm与8mm之间,以具有短焦距与大投影视角的功效,并且本发明的投影装置的有效焦距与投影装置的镜片数量的总和介于14与17之间,使镜片数量限定于6至12个之间,更可有效地降低投影装置的镜片数量。 [0037] As described above, the projection apparatus of the invention at least three aspheric lens, so that the effective focal length of between 5mm and 8mm, having a short focal distance and a large effect of perspective projection, and the projection apparatus of the invention the total number of lenses with effective focal length of the projection apparatus is between 14 and 17, the number of lenses is defined between 6-12, more effective to reduce the number of lenses of the projection apparatus.

[0038] 本发明已由上述相关实施例加以描述,然而上述实施例仅为实施本发明的范例。 [0038] The present invention has been related to the above-described embodiments to be described, however, the above-described embodiments are merely exemplary embodiments of the present invention. 必需指出的是,已揭露的实施例并未限制本发明的范围。 It must be noted that the disclosed embodiments are not limiting the scope of the present invention. 相反地,在不脱离本发明的精神和范围内所作的更动与润饰,均属本发明的专利保护范围。 Rather, the scope of the patent made without departing from the spirit and scope of the present invention cover modifications and variations of the present invention belong.

Claims (7)

  1. 1. 一种投影装置,用于将影像投射至投影幕上,该投影装置包括: 影像产生装置,用以产生具有该影像的投射光,且该影像产生装置具有光阀,使该投射光从该光阀射出;以及投影镜头,设于该光阀与该投影幕之间,并具有光轴,其特征在于该投影镜头包括:复数个镜片,该投射光经该复数个镜片于该投影幕上产生投影影像,其中该复数个镜片包括第一镜片、第二镜片以及第三镜片,且该第一镜片、该第二镜片以及该第三镜片为非球面镜片,在该复数个镜片中,该第一镜片为最邻近该投影幕的镜片; 其中该复数个镜片满足第一关系式14 ^ (EFL+N) ^ 17以及第二关系式5 = EFL = 8,其中EFL为该投影镜头的有效焦距毫米值,且N为该复数个镜片的数量。 1. A projection apparatus for projecting an image onto a projection screen, the projection apparatus comprising: an image generating means for generating projection light having the image, and the image generating means has a light valve, so that the light projected from the light valve; and a projection lens provided between the light valve and the projection screen, and having an optical axis, wherein the projection lens comprises: a plurality of lenses, the light projected through the plurality of lenses in the projection screen generating a projected image, wherein the plurality of lenses comprises a first lens, a second lens and a third lens, and the first lens, the second lens and the third lens are aspherical lenses, the plurality of lenses, the first lens most adjacent to the lens of the projection screen; wherein the plurality of first lens satisfies the relationship of formula 14 ^ (EFL + N) ^ 17, and a second relation formula 5 = EFL = 8, wherein the projection lens for EFL mm effective focal length value, and N is the number of a plurality of lenses.
  2. 2.如权利要求I所述的投影装置,其特征在于该投影影像的中心与该光阀的中心分别位在该光轴的两侧。 2. The projection apparatus as claimed in claim I, characterized in that the center of the projected image with the center of the light valve are respectively located at both sides of the optical axis.
  3. 3.如权利要求I所述的投影装置,其特征在于在该复数个镜片中,该第二镜片为最邻近该光阀的镜片。 I claim projection apparatus as claimed in claim 3, characterized in that the plurality of lenses in the second lens most adjacent to the light valve lens.
  4. 4.如权利要求I所述的投影装置,其特征在于还包括光栏,设置于该第一镜片与该第二镜片之间。 The projection apparatus according to claim I, characterized by further comprising a diaphragm disposed between the first lens and the second lens.
  5. 5.如权利要求4所述的投影装置,其特征在于该第三镜片设于该光栏与该第二镜片之间。 5. The projection apparatus according to claim 4, wherein the third lens is disposed between the diaphragm and the second lens.
  6. 6.如权利要求I所述的投影装置,其特征在于该第一镜片、该第二镜片以及该第三镜片分别具有二个非球面镜面。 I claim projection apparatus as claimed in claim 6, wherein the first lens, the second lens and the third lens having two aspheric mirrors each.
  7. 7.如权利要求I所述的投影装置,其特征在于该光阀的对角线长度大于O. 4英寸。 The projection apparatus according to claim I, wherein the light valve diagonal length greater than O. 4 inches.
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