CN100543511C - DLP long back work distance zooming projection lens - Google Patents

DLP long back work distance zooming projection lens Download PDF

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Publication number
CN100543511C
CN100543511C CN 200710054556 CN200710054556A CN100543511C CN 100543511 C CN100543511 C CN 100543511C CN 200710054556 CN200710054556 CN 200710054556 CN 200710054556 A CN200710054556 A CN 200710054556A CN 100543511 C CN100543511 C CN 100543511C
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lens
group
positive
negative
u2
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CN 200710054556
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CN101149468A (en )
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曹红曲
王天州
马永珍
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利达光电股份有限公司
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本发明涉及一种DLP长后工作距变焦投影镜头,其主要特点是:镜头中的光学系统是由具有负光焦度的调焦组U1和正光焦度的变焦组U2以及正光焦度的补偿组U3组成,U1、U2、U3沿光轴从屏幕侧向像平面侧的顺序排列,其中,调焦是通过U1组的前后移动来实现,变焦是通过U2和U3从广角端到远摄端沿光轴相对移动来实现,在变焦过程中,从镜头第一面到像面总的距离保持不变,该系统具有在较长后工作距离的像面上达到满意成像质量等特点,镜头中的透镜全部采用球面透镜,工艺性好,适应批量生产。 The present invention relates to the latter DLP long working distance of the projection lens, its main features are: an optical lens system is compensated for by the focusing group having a negative refractive power and the zoom group U1 and U2 positive refractive power of the positive refractive power the group consisting of U3, U1, U2, U3 image plane side arranged in order from the screen side along the optical axis, wherein the focusing is achieved by moving back and forth U1 group is a zooming from the wide angle end to the telephoto end by U2 and U3 relatively moving along the optical axis to achieve, during zooming, the first lens to the image side surface of the total distance remains constant, the system has the image plane after a long working distance and other characteristics to achieve satisfactory image quality, the lens the lens used in all spherical lens, good technology, adapt to mass production.

Description

DLP长后工作距变焦投影镜头 After a long working distance DLP projection zoom lens

技术领域 FIELD

本发明属于光学器具技术领域,是一种适合在DLP投影仪上与非远心照明光路配套使用的长后工作距变焦投影镜头。 The present invention belongs to the technical field of optical instrument, it is suitable to work on long after a DLP projector and a non-telecentric illumination optical path from the supporting projection lens used. 背景技术 Background technique

DLP投影显示技术在近几年来发展迅速,其发展趋势为在短投影距离上实现大屏幕、髙清晰度、髙亮度的图像显示,它更能实现体积小,重量轻等产品特性。 DLP projection display technology has developed rapidly in recent years, the development trend is implemented on a large screen with a short projection distance, image clarity Gao, Gao display luminance, which can help achieve small size, light weight and other product characteristics. DLP技术中的核心部件主要采用的是DMD数字图像芯片;DMD是美国德州仪器公司独家掌握并开发的数字图像芯片,由于其面世的时间相对较短,因此与DMD技术相匹配的DLP投影成像光学系统的专利技术不多,而现有的LCD、 LCOS等投影镜头采用的是远心光路系统,不能完全满足DMD数字图像芯片的配套要求,这主要是由于DMD上的微型反光镜在工作时随图像数字信号会有10 或12度的翻转,将来自照明光源的光束通过微反射镜的翻转反射进入投影镜头的入瞳并聚焦在屏幕上,基于这一特点,LCD、 LCOS等投影镜头往往不能充分满足DMD数字图像芯片的配套要求。 DLP technology is mainly used in the core member DMD chip digital image; Texas Instruments DMD is the exclusive control and the development of digital image chip, due to its relatively short time available, thus matching techniques DMD imaging optical projection DLP few patented system, the conventional LCD, LCOS, etc. used in the projection lens telecentric optical system can not fully meet the matching requirements of the digital image DMD chip, which is mainly due to the micro mirror on a DMD with at work the image will be inverted digital signal 10 or 12 degrees, the light beam from the illumination source into the projection lens by flipping reflecting micro mirror and focused on the pupil of the screen, based on this characteristic, LCD, LCOS projection lens and the like are often not fully meet the matching requirements of digital images DMD chip.

另外,在现有公开的变焦投影镜头技术中, 一部分应用了非球面技术,即在变焦投影镜头的光学系统中通过加入非球面透镜来改善系统的成像质量或简化系统结构,但非球面透镜的应用对其加工和装配要求严格,不利于生产效率的提髙和成本的降低,而在没有采用非球面透镜的技术申,为了达到较好的光学性能, Further, in the conventional projection lens system disclosed in the art, part of the application technique aspheric surface, i.e., the optical system in the projection lens to improve the image quality or to simplify the system structure of the system by the addition of an aspheric lens, the aspherical lens application of strict requirements for its machining and assembly is not conducive to reducing the costs and Gao mention productivity, but without the use of the aspheric lens technology application, in order to achieve good optical performance,

其技术措施一般是增加透镜的数量,普遍在12片以上,或是采用国外进口的高折射率的高档光学材料,例如对像差有显著改善的FCD1之类的材料,其价格昂贵、工艺性差、加工效率和成品率很低。 Technical measures which typically increase the number of lenses, generally more than 12, or high-grade optical materials imported foreign high refractive index, e.g. aberrations or the like with the material FCD1 significantly improved, which is expensive, process is poor , processing efficiency and yield is very low. 日本专利02120574技术公开的一种变焦投影镜头申,所采用的材料就包括FCD1、 LAF等高档材料,且透镜数量均在12片以上,因而也同样存在造价高、工效低等问题。 Japanese Patent 02120574 discloses a technology projection lens application, including the materials used FCD1, LAF other high-grade material, and the number of lenses were more than 12, and therefore also the presence of high cost, low efficiency problem. 另外,光学系统在具有长的后工作距离时其像差矫正变得也十分困难,而DLP投影系统有时也需要有较长的后工作距离来满足系统的照明要求。 Further, the optical system having a long back working distance which aberration correction becomes very difficult, and sometimes DLP projection system requires a long back working distance of the system to meet the lighting requirements. 发明内容 SUMMARY

本发明的目的是提供一种能够与DMD数字图像芯片相匹配,且结构紧凑、 实现在较长后工作距离达到满意成像质量、适合批量生产要求的DLP长后工作距变焦投影镜头。 Object of the present invention is to provide a digital image to match the DMD chip, and compact structure, after a long working distance achieved satisfactory image quality, DLP suitable for mass production after a long working distance requirements of the projection lens.

为达到这样的目的,本发明所提供的技术方案是:该变焦投影镜头的光学系统是由具有负光焦度的调焦组Ui和正光焦度的变焦组U2以及正光焦度的补偿组IB组成,Ul、 U2、 U3沿光轴从屏幕侧向像平面侧的顺序排列,其中,U2和U3从广角端到远摄端沿光轴相对移动实现变焦,在变焦过程中,从镜头第一面到像面总的距离保持不变,即该变焦投影镜头为两组移动式变焦,调焦组的组合焦距为fl,补偿组的焦距f2,两者的符号相反,并且需满足下列不等式: To achieve the above object, the technical solution provided by the invention are: the zoom lens of the projection optical system is a group IB from the zoom Ui and U2 focusing group having a positive power and a negative refractive power of the positive refractive power compensating bank composition, Ul, U2, U3 image plane side arranged in order from the screen side along the optical axis, wherein, U2 and U3 from the wide angle end to the telephoto end along the optical axis relative to a zooming movement, during zooming, the first lens the total distance to the image plane faces remain unchanged, i.e., the projection lens system is a zoom groups move, combined focal length of the focusing group is fl, f2 the focal length of the compensating group, both of opposite sign, and the need to satisfy the following inequality:

0.85邻/£2|<1.15其中- 0.85 o /£2|<1.15 which -

调焦组U1从屏幕侧向像面方向由正透镜L1、负透镜L2、负透镜L3组成, Group U1 focusing direction of the image from the screen surface side of a positive lens L1, a negative lens L2, a negative lens L3 composition,

其组合焦距为负。 Combined focal length thereof is negative.

变焦组U2从屏幕侧向像面方向由负透镜L4、正透镜L5、负透镜L6组成, 其中负透镜L4、正透镜L5为双胶合透镜,双胶合透镜中的负透镜L4、正透镜L5均为火石玻璃透镜,变焦组总的焦距为正。 Zoom group U2 plane direction of the image from the screen side by a negative lens L4, the positive lens L5, composed of a negative lens L6, wherein the negative lens L4, the positive lens L5 is a doublet lens, a negative lens L4 of doublet lens, the positive lens L5 are flint glass lens, a focal length of the overall zoom group is positive.

补偿组U3从屏幕侧向像面方向由正透镜L7、正透镜L8、负透镜L9、正透镜LIO、负透镜Lll以及正透镜L12组成,其中,负透镜L9、正透镜LIO、负透镜Lll组成一个三胶合透镜,三胶合透镜中的负透镜L9、负透镜L11均为火石玻璃透镜,正透镜L10为低色散的冕玻璃透镜, 一方面可以更有效的矫正系统的色差,另一方面利用光学级的误差来减小机械装配误差,使得系统的装配简易、公差更加宽容,该补偿组U3总的焦距为正。 Compensation unit U3 from the screen side direction of the image plane of a positive lens L7, a positive lens L8, L9 of a negative lens, a positive lens LIO, a negative lens and a positive lens L12 Lll composition, wherein L9 of a negative lens, a positive lens LIO, composed of a negative lens Lll a three-cemented lens, the cemented lens in three L9 of the negative lens, negative lens L11 are flint glass lens, a positive lens L10 to the lens of crown glass of low chromatic dispersion, one can more effectively correcting chromatic aberration of the system, on the other hand by an optical to reduce the error level of the mechanical assembling errors, making the system easy assembly, more tolerant tolerances, the total focal length of the positive compensation unit U3. 系统中各透镜均为球面透镜,透镜总数为12片。 Each lens system are spherical lenses, a total of 12 lenses.

为充分提高像面均匀性,DLP投影镜头的出瞳距离要控制在和DMD微反射镜的反射光角度相匹配的范围内,另外,为了结构的简单及可行,DLP投影镜头的尾端的口径要尽量的小,以保证有足够的空间使得照明光路能得到有效合理的布置。 In order to fully enhance the exit pupil from the image plane uniformity, DLP projection lens to be controlled in the range of reflected light angle of DMD micromirror match, Further, in order caliber tail simple and feasible, DLP projection lens structure to be as small as possible to ensure that there is enough space so that the illumination light path can be effectively reasonable arrangement. 当然,投影镜头的后部口径也不能太小,太小的口径一方面不能保证整个系统的F数,还可能影响到成像面的照度均匀性。 Of course, the rear aperture of the projection lens can not be too small, too small diameter can not be guaranteed on the one hand the F-number of the entire system, may also affect the uniformity of the illuminance of the imaging plane. 本发明的优点在于-1、 系统申未采用工艺复杂的非球面透镜,因而提高了透镜及变焦镜头的加工和装配的简易性,提高了产品成品率和生产效率,更适应批量生产。 Advantage of the present invention is to -1, the application process does not employ complex aspheric lens, thereby improving the ease of the lens and the zoom lens processing and assembly, improving the product yield and production efficiency, better adapted for mass production.

2、 在保证长后工作距离成像质量的同时,以较少数量的球面透镜组合构成整个系统,并采用常规的光学材料,降低产品成本。 2, to ensure a long working distance imaging quality after the same time, a smaller number of spherical lenses in combination constitute the entire system, and the use of conventional optical materials, to reduce the product cost.

3、 通过两个透镜组的移动保证整个焦距范围内成像质量的一致性,并能保持较髙水准的像差矫正,结构中又省去了后固定透镜组,因此结构更为紧凑。 3, by moving the two lens groups of the entire focal length range to ensure consistency of image quality, and to maintain a more level of aberration correction Gao, after the structure has a fixed lens group is omitted, the structure more compact.

4、 本发明设置了与DMD数字图像芯片相匹配的短出瞳距离保证系统,其光能输出和对比度的得到显著提高。 4, the present invention is provided with the DMD chip digital image matches a short exit pupil distance of the system to ensure that the light output and contrast is significantly improved.

5、 本发明具有结构紧凑、调焦方便、投影图象清晰等特点。 5, the present invention has a compact structure, easy to focus, etc. of the projected image clear. 附图说明 BRIEF DESCRIPTION

图1是本发明变焦镜头的结构示意图; FIG. 1 is a structural diagram of a zoom lens of the present invention;

图2是本发明变焦镜头短焦的光学系统图; FIG 2 is a short-focus zoom lens of the present invention is an optical system diagram;

图3是本发明变焦镜头长焦的光学系统图; FIG 3 is an optical system of the telephoto zoom lens of the present invention, FIG;

图4是本发明变焦镜头在短焦的光线轨迹图; The zoom lens according to the present invention, FIG. 4 is a ray trace in FIG short focus;

图5是本发明变焦镜头在长焦的光线轨迹图; FIG 5 is a ray trace of the zoom lens of the present invention in FIG telephoto;

图6是本发明变焦镜头在短焦的场曲和畸变曲线图; FIG 6 is a zoom lens of the present invention in the curvature of field and distortion at the short focal graph;

图7是本发明变焦镜头在长焦的场曲和畸变曲线图; FIG 7 is a graph showing the curvature of field and distortion at the telephoto zoom lens of the present invention;

图8是本发明变焦镜头在短焦的传递函数曲线图; FIG 8 is a graph showing a transfer function of the short focus of the zoom lens according to the present invention;

图9是本发明变焦镜头在长焦的传递函数曲线图; FIG 9 is a graph showing a transfer function in the telephoto zoom lens according to the present invention;

6图10是本发明变焦镜头在短焦的垂轴像差曲线图; 图il是本发明变焦镜头在长焦的垂轴像差曲线图; 图12是本发明变焦镜头在短焦的点列图; 图B是本发明变焦镜头在长焦的点列图。 FIG 6 is a vertical axis of the aberration curve 10 in FIG short focus zoom lens according to the present invention; FIG il is the vertical axis of the aberration in the telephoto zoom lens of the present invention, the graph; FIG. 12 is a zoom lens of the present invention are listed in the short focal point of ; Figure B is a zoom lens of the present invention at the telephoto dot lines in FIG.

具体实施方式 detailed description

参看图l、图2、图3,本发明的DLP长后工作距变焦投影镜头,主要部件包括调焦环l、调焦限位环2、调焦镜筒3、导向筒4、滚轮导钉5、变焦手柄6、 变焦镜筒7、曲线筒8、滚轮导钉9、补偿镜筒10、后镜筒11、滚轮导钉12以及光学系统透镜组。 Referring to FIG. L, FIG. 2, FIG. 3, the present invention DLP long working distance of the projection lens, the main components including L focus ring, the focus stop ring 2, a focusing lens barrel 3, the guide tube 4, the staple guide roller 5, the handle 6 zoom, the zoom lens barrel 7, curve cylinder 8, the staple guide roller 9, the compensation lens barrel 10, the barrel 11, the staple guide roller 12 and an optical system lens group. 其中;调焦镜筒3通过螺纹连接在导向筒4的前端,其前部套装有调焦环l,转动调焦环l,可带动调焦镜筒3随之转动,并相对于导向筒4轴向移动,实现调焦组Ul的调焦功能,同时由安装在调焦镜筒3上的调焦限位环2限止其移动的最大位移。 Wherein; focusing lens barrel 3 by screwing the distal end of the guide cylinder 4, the front portion of the focus ring sleeved L, L by turning the focus ring, the focus lens barrel 3 can be driven for rotation therewith and relative to the guide tube 4 axially movable, to effect a focusing function of focusing Ul group, while the focusing ring by a stopper mounted on the focusing lens barrel 3 2 maximum displacement limiting, its movement. 导向筒4的外部套装有曲线筒8,曲线筒8上设有用于变焦镜筒7、补偿镜筒10移动的两个曲线滑槽和一个限止曲线筒8轴向移动的等位滑槽,并通过装在导向筒4上的滚轮导钉5与等位滑槽的滑动配合实现曲线筒8的转动,同时限止曲线筒8的轴向移动,变焦手柄6联接在曲线筒8 上,用于操纵曲线筒8的转动。 The guide cylinder 4 has a curved outer package tube 8, is provided with 7, two curves of the chute 10 moves the lens barrel and allelic compensation curve cylindrical chute 8 for axial movement of a zoom lens barrel 8 on the curve limiting, cylinder, and mounted by sliding the staple guide roller 5 and the like on the position of the chute with the guide tube 4 curves effect rotation of cylinder 8, while limiting, curve cylinder 8 moves axially, the handle 6 is coupled to the zoom curve cylinder 8 for actuating curve barrel 8 is rotated. 变焦镜筒7套装在导向筒4内部,其周侧装有与曲线筒8上的曲线滑槽滑动配合的滚轮导钉12,当曲线筒8转动时,滚轮导钉12可沿曲线滑槽滑动,并沿导向筒4上开设的限位滑槽轴向移动,同时带动变焦镜筒7移动,达到变焦组U2变焦的目的。 In the zoom lens barrel 7 set inside the guide cylinder 4, the chute profile on its circumferential side 8 of the cartridge with sliding fit curve staple guide roller 12, rotation of the curve when the cartridge 8, the staple guide roller 12 slide along the curve of the chute may be and limiting the chute along the axial direction of the guide cylinder 4 defines the movement, while driving the lens barrel 7 is moved, to achieve zooming zoom group U2. 为了方便补偿组U3的组装,补偿镜筒10的后端连接有后镜筒11,补偿镜筒10与导向筒4套装连接,并通过联接在补偿镜筒10上的滚轮导钉9与曲线筒8上的曲线滑槽及导向筒4上的限位滑槽实现补偿透镜组U3的补偿功能。 To facilitate assembly of the compensation unit U3, compensating rear barrel 10 is connected to the rear barrel 11, barrel 10 is connected to the compensating cylinder guide 4 set, and coupling the rollers by a staple guide barrel 10 to the compensating cylinder 9 and the curve on the curve limiting chutes 4 and sliding on the guide cylinder 8 to realize the compensation of the compensating lens unit U3. 正透镜Ll 、负透镜L2及负透镜L3通过压圈和隔圈组装在调焦镜筒3内,构成调焦组U1;负透镜L4、正透镜L5、负透镜L6组装在变焦镜筒7内,构成变焦组U2;正透镜L7、正透镜L8组装在补偿镜筒10内,连同组装在后镜筒内11的负透镜L9、正透镜LIO、负透镜Lll以及正透镜L12构成补偿组U3 。 Ll positive lens, a negative lens and a negative lens L2, L3 by press and the spacer ring assembled in the focusing lens barrel 3, constituting the focusing group Ul; negative lens L4, L5 of a positive lens, a negative lens L6 is assembled within a lens barrel 7 constituting the zoom group U2; positive lens L7, L8 positive lens barrel 10 is assembled in the compensation, is assembled together with the negative lens L9 in the lens barrel 11, LIO positive lens, a negative lens and a positive lens L12 with Lll correction group U3.

本发明的DLP变焦投影镜头申的光学系统采用12片透镜结构,系统申只包括一个双胶合透镜L4、 L5和一个三胶合透镜L9、 LIO、 Ul。 DLP projection lens application of the present invention an optical system using a lens structure 12, comprising only one system application doublet lens L4, L5, and a three-cemented lens L9, LIO, Ul. 该镜头采用常规的机械式补偿凸轮机构,对于不同距离的投影图像可通过调焦组U1的前后移动迸行调焦,通过补偿组U3沿光轴的前后移动来保证像面稳定,整个系统为负一正一正型结构。 The lens uses a conventional mechanical cam mechanism to compensate for different distances of the projected image can be moved back and forth by the focus of the focus group into line U1, the compensation unit U3 moves back and forth along the optical axis through the image plane to ensure the stability of the entire system a positive and negative n-type structure. 图2是短焦系统图,图3是长焦系统图,dw是短焦时两移动组即U2与U3之间的间隔,dt是长焦时U2与U3之间的间隔。 FIG 2 is a short-focus system, and FIG. FIG. 3 is a telephoto system, when the DW is the interval between two moving group i.e. the short focal U2 and U3, dt is the time interval between the telephoto U2 and U3. 本发明为两组相对移动的变焦系统,光束在经过补偿组U3后不再经过常规的后固定透镜组而直接在芯片上形成实像,因此,补偿组U3的焦距必须为正,即变焦单元为正一正型结构,这样可以使得结构进一步紧凑。 The present invention is a two relatively movable zoom system, after the light beam is no longer compensation unit U3 after conventional fixed lens group and a real image is formed directly on the chip, therefore, the compensation unit U3 must be a positive focal length, i.e., zoom unit is n a positive structure so that the structure can be further compact.

变焦镜头调焦组Ul包括3个透镜,即1个正透镜Ll和2个负透镜L2、 L3, 变焦组包括3个透镜,即1个正透镜L5和2个负透镜L4、 L6,补偿组包括6 个透镜,即4个正透镜L7、 L8、 LIO、 L12和2个负透镜L9、 Lil,这样,由正负透镜的对应搭配可以保证前后移动透镜组的像差能充分独自矫正,也才可能构成一个仅由两组移动透镜构成并在长后工作距离达到满意成像质量的变焦系统, 而且这种结构更有利于在变焦过程中的像质稳定。 Ul focusing the zoom lens group comprising three lenses, i.e., a positive lens and two negative lenses Ll L2, L3, zoom group comprising three lenses, i.e., a positive lens L5 and two negative lens L4, L6, correction group including six lenses, i.e., four positive lenses L7, L8, LIO, L12 and two negative lens L9, Lil, so that, by the negative lens corresponds with longitudinal movement of the lens can ensure that the aberration can be sufficiently corrected group alone, but also it may constitute a movement consists of only two lens and, after a long working distance satisfactory image quality zoom system, and this structure is more conducive to the image quality during zooming stability. 为了不让后端的透镜口径太大,系统光栏设置在镜头的后部,否则,在满足后部透镜口径小的前提下,像差的矫正变得十分困难。 To keep the rear end of the lens diameter is too large, light bar system set up at the rear of the lens, otherwise, meet at the rear of the small caliber premise lens, aberration correction becomes very difficult. 当然,还可以通过适当加大前端透镜的口径,使得光束的轨迹更加平滑。 Of course, by appropriately increasing the diameter of the front end of the lens, such that the trajectory of the beam smoother.

对光线具有发散作用的调焦组Ul将远距离的物成像在变焦组U2的物方2 倍焦距附近的位置,使变焦组U2处于放大率为一1的位置附近,这样有利于为实现一定的变焦比不至于透镜组的移动距离过长而增加系统的总长。 Ul focusing group having a diverging effect on the beam position near distance imaging a zoom group was 2 times the square of the focal length of U2, U2 set in the vicinity of the zoom position of a magnification of 1, this will help to achieve a certain than the moving distance of the zoom lens group is too long will not increase the overall length of the system.

为了能使变焦投影镜头在不同的投影距离成像清晰,分配在调焦组U1的光焦度要合理,应该满足如下不等式: In order to make clear the projection lens at different distances of the projection image, a focus optical power distribution in the set U1 should be reasonable, should satisfy the following inequality:

0.85邻/f2卜U5 0.85 o / f2 Bu U5

其申,fl为调焦组U1的组合焦距,f2为补偿组的组合焦距,超出这个范围, His application, fl combined focal length of the focusing group U1, f2 is a composite focal length correction group, beyond this range,

其它位置的像差就较难控制。 Other locations on the aberration is difficult to control. 本发明变焦投影镜头的结构参数如下<formula>formula see original document page 9</formula>S 23.77 5.49303868373 THCO The structural parameters of the projection lens system of the present invention as <formula> formula see original document page 9 </ formula> S 23.77 5.49303868373 THCO

S -374.583 1.5 FEL6—HOYA S 29.986 12.9535210365 S -374.583 1.5 FEL6-HOYA S 29.986 12.9535210365

Trico Trico

S -528.6 1.5FD8一HOYA S 21,78 7.8 NBFD15一HOYA S -58.5 6.02 S -528.6 1.5FD8 a HOYA S 21,78 7.8 NBFD15 a HOYA S -58.5 6.02

S -37.0302747048 1.5BAK4—CHINA CCYO S -37.0302747048 1.5BAK4-CHINA CCYO

S 247.492 16.7450887846 THCO S 247.492 16.7450887846 THCO

S 218.8 3.06 LAK12—CHINA S -88,3 0.2 S 218.8 3.06 LAK12-CHINA S -88,3 0.2

S 28.777 4.0 BAF10—HOYA S 268.32 8.48 S 0.0 5.1 STO S 28.777 4.0 BAF10-HOYA S 268.32 8.48 S 0.0 5.1 STO

S 82.04 1.4 FD8—HOYA S 26.623 6.34 QK3—CHINA S -26.623 1.4NBFD12一HOYA S -45.71.13 S 82.04 1.4 FD8-HOYA S 26.623 6.34 QK3-CHINA S -26.623 1.4NBFD12 a HOYA S -45.71.13

S 108.459221752 3.0 FDS90—HOYA CCYO S 108.459221752 3.0 FDS90-HOYA CCYO

S -73.79 32.0083514952 THCO S -73.79 32.0083514952 THCO

S 0.0 3.0FK5 SCHOTT S 0.0 3.0FK5 SCHOTT

10<table>table see original document page 11</column></row> <table>表中Field为相对全视场的视场坐标,R为长波与参考光的倍率色差,单位: 10 <table> table see original document page 11 </ column> </ row> <table> Field of the table relative to the full field of view coordinates, R is the chromatic aberration of magnification and the reference light of long wavelength, by:

微米,B为短波与参考光的倍率色差,单位:微米。 M, B is a chromatic aberration of magnification and the reference light of short wavelength, unit: m.

参看图4、图5,是本发明的变焦镜头在短焦、长焦的光线轨迹图;图4是短焦的光线轨迹图,图5是长焦的光线轨迹图。 Referring to FIG. 4, FIG. 5, the zoom lens at the short focal present invention, FIG telephoto ray trace; FIG. 4 is a ray trace of short focus, and FIG. 5 is a ray trace telephoto FIG.

参看图6、图7,是本发明的变焦镜头在短焦、长焦的场曲和畸变曲线图, 图6是短焦的场曲和畸变曲线图,图7是长焦的场曲和畸变曲线图。 Referring to FIG. 6, FIG. 7 is a graph showing the curvature of field and distortion of the zoom lens at the short focal invention, telephoto, FIG. 6 is a short focus and field curvature distortion diagram, FIG. 7 is a curvature of field and distortion telephoto Graph.

参看图8、图9,是本发明的变焦镜头在短焦、长焦在461p/mm的传递函数曲线图,图8是短焦的传递函数曲线图,图9是长焦的传递函数曲线图。 Referring to FIG. 8, FIG. 9, the zoom lens of the present invention, the transfer function at the short focal graph, in the telephoto 461p / mm, and FIG. 8 is a graph showing a transfer function of the short-focus, FIG. 9 is a graph showing the transfer function telephoto .

参看图10、图11,是本发明的变焦镜头在短焦、长焦的垂轴像差曲线图, 图10是短焦的垂轴像差曲线图,图11是长焦的垂轴像差曲线图。 Referring to FIG. 10, FIG. 11, the zoom lens of the present invention, the vertical axis of the aberration curve in FIG short focus, telephoto, vertical axis of FIG. 10 is a graph showing the aberration at the short focal, and the vertical axis of FIG. 11 is a telephoto Graph.

参看图12、图13,是本发明的变焦镜头在短焦、长焦的点列图,图i2是短焦的点列图,图13是长焦的点列图。 Referring to FIG. 12, FIG. 13, the zoom lens at the short focal present invention, the telephoto spot diagram, FIG i2 short focus spot diagram, FIG. 13 is a spot diagram telephoto.

Claims (4)

  1. 1、一种DLP长后工作距变焦投影镜头,镜头中的光学系统是由具有负光焦度的调焦组U1和正光焦度的变焦组U2以及正光焦度的补偿组U3组成,各组沿光轴从屏幕侧向像平面侧的顺序排列,其中,变焦组U2和补偿组U3从广角端到远摄端沿光轴相对移动实现变焦,在变焦过程中,从镜头第一面到像面总的距离保持不变,该变焦投影镜头为两组移动式变焦,调焦组U1的组合焦距为fl,补偿组U3的焦距为f2,两者的符号相反,并且满足下列不等式:0.85<|fl/f2|<1.15,其特征在于:调焦组U1从屏幕侧向像面方向由正透镜L1、负透镜L2、负透镜L3组成,其组合焦距为负,变焦组U2从屏幕侧向像面方向由负透镜L4、正透镜L5、负透镜L6组成,其中负透镜L4、正透镜L5为双胶合透镜,变焦组U2总的焦距为正,补偿组U3从屏幕侧向像面方向由正透镜L7、正透镜L8、负透镜L9、正透镜L10、负 1, the latter DLP projection lens long working distance, the lens optical system is composed of a focus group U3, U1 and U2, and a compensation set zoom group of positive refractive power of the positive refractive power having a negative refractive power, each group the image plane side arranged in order from the screen side along the optical axis, wherein the compensating group zoom group U2 and U3 from the wide angle end to the telephoto end along the optical axis relative to a zooming movement, during zooming, the first lens to the image surface the total area constant distance, the projection lens is moved two zoom, focus group U1 is a combined focal length fl, a focal length of the compensation unit U3 is f2, the two opposite signs, and satisfies the following inequality: 0.85 < | fl / f2 | <1.15, wherein: a focusing screen from group U1 lateral direction of the image plane of a positive lens L1, a negative lens L2, a negative lens L3, whose combined focal length of the negative, from the screen side zoom group U2 direction of the image plane of a negative lens L4, the positive lens L5, composed of a negative lens L6, wherein the negative lens L4, the positive lens L5 is a doublet lens, the focal length of the overall zoom group U2 is positive, the compensation unit U3 direction of the image from the screen by the lateral face positive lens L7, a positive lens L8, a negative lens L9, a positive lens L10, a negative 镜L11以及正透镜L12组成,其中,负透镜L9、正透镜L10和负透镜L11为三胶合透镜,补偿组U3的总焦距为正。 Lens L11 and a positive lens L12, where, L9 of the negative lens, a positive lens L10 and negative lens L11 three cemented lens, the focal length of the total compensation unit U3 is positive.
  2. 2、 根据权利要求1所述的DLP长后工作距变焦投影镜头,其特征在于: 所述双胶合透镜中的负透镜L4、正透镜L5均为火石玻璃透镜。 After 2, DLP length according to claim 1, said working distance of the projection lens, wherein: the negative lens L4 of doublet lens, the positive lens L5 are flint glass lens.
  3. 3、 根据权利要求1所述的DLP长后工作距变焦投影镜头,其特征在于:所述三胶合透镜中的负透镜L9、负透镜L11均为火石玻璃透镜,正透镜L10为低色散的冕玻璃透镜。 After 3 DLP long work, according to claim 1 from the projection lens, wherein: the three negative lens L9 cemented lens, the negative lens L11 are flint glass lens, a positive lens L10 of a low dispersion crown glass lens.
  4. 4、 根据权利要求1所述的DLP长后工作距变焦投影镜头,其特征在于: 所述调焦组Ul、变焦组U2和补偿组U3中各透镜均为球面透镜,其透镜的总数是12片。 4, according to claim 1 DLP after long working distance of the projection lens, wherein: the focusing group Ul, U2 and compensating zoom group each lens unit U3 are spherical lenses, the total number of the lens is 12 sheet.
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CN101887163B (en) * 2010-06-29 2012-07-25 利达光电股份有限公司 Front focusing and focus-fixing projection lens
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JP5754124B2 (en) * 2010-12-14 2015-07-29 セイコーエプソン株式会社 Projector and a control method
CN103389565B (en) * 2013-08-15 2015-06-17 福建福光数码科技有限公司 Low-distortion and high-resolution infrared miniature lens

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EP0809407A1 (en) 1996-05-24 1997-11-26 Corning Incorporated Projection lenses having large back focal length to focal length ratios
US6590716B2 (en) 2001-04-27 2003-07-08 Seiko Epson Corporation Projection zoom lens
CN201141936Y (en) 2007-06-12 2008-10-29 利达光电股份有限公司 DLP long rear work distance zooming projection lens

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
EP0809407A1 (en) 1996-05-24 1997-11-26 Corning Incorporated Projection lenses having large back focal length to focal length ratios
US6590716B2 (en) 2001-04-27 2003-07-08 Seiko Epson Corporation Projection zoom lens
CN201141936Y (en) 2007-06-12 2008-10-29 利达光电股份有限公司 DLP long rear work distance zooming projection lens

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