TWM396970U - Projector with zoom lens and projection-type display device - Google Patents

Description

M396970M396970

Le構成。 透過以下可以更加容易地實現本創作的課題，即，透 過將上述第一透鏡組G!和上述第二透鏡組&中的至少一 方設爲如上述的透鏡光焦度配置，不僅充分確保長後截 距，並且在變倍的整個區域以球面像差及其變動、非點像 差及倍率色像差爲首包括軸上色像差或像面彎曲等的各像 差仔到充分抑制的高解析度的投影用變焦透鏡能夠獲得。 而且，較佳地，上述第二透鏡組G2由凹面朝向放大側 的具有負的折射力的第五透鏡Ls、凸面朝向縮小側的具有 正的折射力的第六透鏡構成。透過這樣構成，可以爲軸 卜光束透過透鏡的兩的位置的形態，尤其可以獲得非點像 差及像面彎曲良好的透鏡組。 另外’聚焦透過將第一透鏡組Gi的整體沿光轴Z方向 移動來進行。 而且’第六透鏡組G0是變倍時固定的中繼透鏡，在該 第"透鏡組Ge與作爲光閥的圖像顯示面1之間配設合 鏡2。 另外’本實施方式的投影用變焦透鏡滿足以下條件式 (1 )〜（3 ) 〇 3.〇<f3/fw<5.〇 .....⑴ 其中， fW •廣角端的透鏡整個系統的焦距 f3.第三透鏡組G3的焦距 上述條件式（1)是用於適當地規定第三透鏡組g3的 9 M396970 光焦度的條件式。 作爲第三透鏡組G3，較佳地，採用將入射到第四透鏡 組G4及第五透鏡組Gs的光線的高度最佳化、以及能夠得到 充分的後截距的程度的光焦度。這些透過滿足條件式（^ ) 得以實現。即，若低於該條件式（的下限，則第三透鏡 組A的光焦度變得過強，難以確保充分的後截距，另一方 〜咏丄,.队，則弗二达蜆驵…的无焦度變弱，入」 到第五透鏡組Gs的光線變高，難以校正球面像差或慧形1 差。 從這種觀點，較佳地，滿足下述條件式（厂）代替上 述條件式（1 )。 3.3<f3/fw<4.6 ...... ( 1，） 另外，本實施方式的投影用變焦透鏡滿足以下條件式 1.8<Bf/fw<3.〇 其中， fw :在廣角端的透鏡整個系統的焦距 Bf .透鏡整個系統的縮小側的空氣換算後截距 透過滿足上述條件式（2)，抑制透鏡的大型化，並 分的後截距。即’若低於條件式（2)的下限 、，、技景/用變焦透鏡和光閥之間插人合色稜鏡等的' =系統，另—方面’若超過該上限，會牵涉到物 2’）代替上述條Le constitutes. The problem of the present invention can be achieved more easily by providing at least one of the first lens group G! and the second lens group & as the above-described lens power arrangement, not only to ensure sufficient length Intercept, and the total aberration including axial chromatic aberration or field curvature, including spherical aberration and its variation, astigmatism and chromatic aberration of magnification, in the entire region of the magnification is sufficiently suppressed A resolution projection can be obtained with a zoom lens. Further, preferably, the second lens group G2 is composed of a fifth lens Ls having a negative refractive power on the concave side and a sixth lens having a positive refractive power on the reduction side. According to this configuration, it is possible to obtain a lens group in which the axial beam is transmitted through the two positions of the lens, and in particular, a lens group having excellent astigmatism and field curvature can be obtained. Further, the focus is performed by moving the entirety of the first lens group Gi in the optical axis Z direction. Further, the sixth lens group G0 is a relay lens that is fixed at the time of magnification change, and the mirror 2 is disposed between the lens group Ge and the image display surface 1 as a light valve. Further, the projection zoom lens of the present embodiment satisfies the following conditional expressions (1) to (3) 〇 3. 〇 <f3/fw <5. 〇.. (1) where fW • the wide-angle end lens of the entire system Focal length f3. Focal length of the third lens group G3 The conditional expression (1) above is a conditional expression for appropriately specifying the 9 M396970 refractive power of the third lens group g3. As the third lens group G3, it is preferable to optimize the height of the light rays incident on the fourth lens group G4 and the fifth lens group Gs and to obtain a sufficient back intercept. These are achieved by satisfying the conditional formula (^). In other words, if the value is lower than the lower limit of the conditional expression, the power of the third lens unit A becomes too strong, and it is difficult to secure a sufficient back intercept, and the other side is 咏丄, 队, 傅二达蚬驵The degree of non-focalness of ... becomes weak, and the light entering the fifth lens group Gs becomes high, and it is difficult to correct spherical aberration or coma. For this point of view, it is preferable to satisfy the following conditional formula (factory) instead. The above-described conditional expression (1). 3.3 <f3/fw<4.6 (1) Further, the projection zoom lens of the present embodiment satisfies the following conditional expression 1.8 < Bf / fw < 3. , fw : the focal length of the entire system at the wide-angle end lens Bf. The air-converted intercept of the lens on the reduction side of the lens system satisfies the above conditional expression (2), suppresses the enlargement of the lens, and divides the back intercept. Below the lower limit of the conditional expression (2), the '= system with the color combination between the zoom lens and the light valve, etc., if the upper limit is exceeded, the object 2') Replace the above

從這種觀點，較佳地，滿足條件式 10 M396970 圖2是表示實施例1有關的投影用變焦透鏡的在廣角端 (WIDE)及望遠端（TEle)的各透鏡組的移動位置的圖。 圖3是表示實施例2有關的投影用變焦透鏡的透鏡結構 圖。 圖4是表示實施例2有關的投影用變焦透鏡的在廣角端 (WIDE)及望遠端（TELE)的各透鏡組的移動位置的圖。 圖5是實施例3有關的投影用變焦透鏡的透鏡結構圖。 圖6是表示實施例3有關的投影用變焦透鏡的在廣角端 (WIDE)及望遠端（TELE)的各透鏡組的移動位置的圖。 圖7是實施例4所關的投影用變焦透鏡的透鏡結構圖。 圖8是表示實施例4有關的投影用變焦透鏡的在廣角端 (WIDE)及望遠端（TELE)的各透鏡組的移動位置的圖。 圖9是實施例1有關的投影用變焦透鏡的在廣角端 (WIDE)、中間位置（MIDDLE)及望遠端（TELE)的 各像差圖。 圖10是實施例2有關的投影用變焦透鏡的在廣角端 (WIDE)、中間位置（MIDDLE)及望遠端（TELE)的 各像差圖。 圖11是實施例3有關的投影用變焦透鏡的在廣角端 (WIDE)、中間位置（MIDDLE)及望遠端（TELE)的 各像差圖。 圖12是實施例4有關的投影用變焦透鏡的在廣角端 (WIDE)、中間位置（MIDDLE)及望遠端（TELE)的 各像差圖。 25 M396970 圖13是表示本實施方式有關的投影型顯示裝置的一部 分的簡要圖。 【主要元件符號說明】 透鏡組G1〜G6 曲率半徑R1〜R32 圖像顯示面1 投影用變焦透鏡10 二向色鏡12，13 聚光透鏡16a〜16c 光源20 面間隔D1〜D31 透鏡L1〜L15 孔徑3From this point of view, it is preferable that conditional expression 10 M396970 is satisfied. FIG. 2 is a view showing a movement position of each lens group at the wide angle end (WIDE) and the telephoto end (TEle) of the projection zoom lens according to the first embodiment. Fig. 3 is a view showing a lens configuration of a projection zoom lens according to a second embodiment. 4 is a view showing a movement position of each lens group at a wide angle end (WIDE) and a telephoto end (TELE) of the projection zoom lens according to the second embodiment. Fig. 5 is a view showing a lens configuration of a projection zoom lens according to a third embodiment. Fig. 6 is a view showing a movement position of each lens group at a wide angle end (WIDE) and a telephoto end (TELE) of the projection zoom lens according to the third embodiment. Fig. 7 is a view showing a lens configuration of a zoom lens for projection which is closed in the fourth embodiment. 8 is a view showing a movement position of each lens group at a wide angle end (WIDE) and a telephoto end (TELE) of the projection zoom lens according to Example 4. FIG. Fig. 9 is a view showing aberrations at the wide angle end (WIDE), the intermediate position (MIDDLE), and the telephoto end (TELE) of the projection zoom lens according to the first embodiment. Fig. 10 is a view showing aberrations at the wide angle end (WIDE), the intermediate position (MIDDLE), and the telephoto end (TELE) of the projection zoom lens according to the second embodiment. Fig. 11 is a diagram showing aberrations at the wide angle end (WIDE), the intermediate position (MIDDLE), and the telephoto end (TELE) of the projection zoom lens according to the third embodiment. Fig. 12 is a diagram showing aberrations at the wide angle end (WIDE), the intermediate position (MIDDLE), and the telephoto end (TELE) of the projection zoom lens according to the fourth embodiment. 25 M396970 FIG. 13 is a schematic diagram showing a part of a projection display apparatus according to the present embodiment. [Description of main component symbols] Lens group G1 to G6 Curvature radius R1 to R32 Image display surface 1 Projection zoom lens 10 Dichroic mirror 12, 13 Condenser lens 16a to 16c Light source 20 Surface interval D1 to D31 Lens L1 to L15 Aperture 3

透射式液晶面板11a〜11c 交叉二向稜鏡14 全反射鏡18a〜18c 光軸ZTransmissive liquid crystal panels 11a to 11c cross two-way 稜鏡 14 total reflection mirrors 18a to 18c optical axis Z

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Claims (1)

M396970 ίο.- i年月 六、申請專利範圍： 1 ·—種投影用變隹洁护 a ^ …、透、兄，其十，從放大側依次配$·. 具有負的折射力的第一透 』伋人I又. 鏡^ 透视、，且、具有正的折射力的第二透 祝.，且、具有正的折射 _ ^ 第四透鏡电、… 鏡組、具有正的折射力的 透鏡組具有負的折射力的第五透鏡組、及 折射力的第六透鏡組，並且是 ，、有正的 變倍時，從該第三透鏡 。構在 π弁鈿孩b ^ 第五透鏡組爲止的各透鏡組 Ζ先軸移動，㈣一透鏡組及該第六透鏡組 :二透鏡組沿著該光軸移動或被固定；在聚焦： 透鏡組沿該光轴移動，並滿足下述條件式⑴ 3.0<f3/fw<5.〇 ...... ( }) 1 -8<Bf/fw<3.〇 ...... ( 2 ) 55< v d56 ...... ( 3 ) 其中， fw .在廣角端的透鏡整個系統的焦距 込：上述第三透鏡組的焦距 H56:該第五透鏡組和該第六透鏡組所包含的正透鏡 的阿貝數的平均值 Bf:透鏡整個系統的縮小側的空氣換算後截距。 2·如申請專利範圍第1項所述的投影用變焦透鏡，其滿 足下述條件式（4): 55< v d4 ...... (4) 其中， v ^修正' 補充 以：構成該第四透鏡組的且具有正的折射力的透鏡 27 M396970 ΙδΓίδ -a . 1 年Λ補尤i 對d線的阿貝數的平均值。 3·如申請專利範圍第1或2項所述的投影用變焦透鏡， 其中’》亥苐一透鏡組由凹面朝向放大側的且具有負折射力 的透鏡、及凸面朝向縮小側的且具有正折射力的透鏡構成。 4.如申請專利範圍第1或2項所述的投影用變焦透鏡， 其中，爲了在整個變倍區域中謀#數值的一定化，將孔 徑直徑能夠變化的孔徑光闌配設在該第三透鏡組和該第四 透鏡組之間。 5·如申請專利範圍第1或2項所述的投影用變焦透鏡， 其中，該第一透鏡組從放大侧依次由四片透鏡構成，該四 片透鏡透過具有正折射力的透鏡、具有負折射力的透鏡、 具有負折射力的透鏡、及具有負折射力的透鏡而成。 6.如申請專利範圍第丨或2項所述的投影用變焦透鏡， 其中，該第二透鏡組從放大側依次由二片透鏡構成，該二 片透鏡透過具有負折射力的透鏡、及具有正折射力的透鏡 而成。 -種投影型顯示裝置’其包括：光源、光閥、將來 自該光源的光束引導至該光閥的照明光學部、及申往專利 範圍第i項至第6項中任一項所述的投影用變焦透=，並 且，來自該光源的光束由該光閥進行光調變、且由誃 用變焦透鏡投影到螢幕上。 又〜 28 MmQ70M396970 ίο.- i, the sixth month of application, the scope of application for patents: 1 · a kind of projection with a clean and protective a ^ ..., through, brother, ten, from the side of the magnification with $ ·. first with negative refractive power汲 汲 I I I. Mirror ^ perspective, and, with a positive refractive power of the second pass, and, with positive refraction _ ^ fourth lens electricity, ... mirror, lens with positive refractive power A fifth lens group having a negative refractive power and a sixth lens group having a refractive power, and being, when there is a positive magnification, from the third lens. Each of the lens groups is configured to move in a first axis, (4) a lens group and the sixth lens group: the two lens groups move or are fixed along the optical axis; in focus: lens The group moves along the optical axis and satisfies the following conditional expression (1) 3.0 <f3/fw<5.〇... ( }) 1 -8<Bf/fw<3.〇... (2) 55< v d56 (3) where fw is the focal length of the entire system of the lens at the wide-angle end: the focal length H56 of the third lens group: the fifth lens group and the sixth lens group The average value of the Abbe number of the included positive lens Bf: the air-converted intercept on the reduced side of the entire system of the lens. 2. The projection zoom lens according to claim 1, which satisfies the following conditional expression (4): 55 < v d4 (4) wherein, v ^correction is added: The lens of the fourth lens group and having a positive refractive power, 27 M396970 ΙδΓίδ -a. The average value of the Abbe number of the d-line. The zoom lens for projection according to claim 1 or 2, wherein the lens is a lens having a concave surface facing the magnification side and having a negative refractive power, and a convex surface facing the reduction side and having a positive A lens consisting of a refractive power. 4. The projection zoom lens according to claim 1 or 2, wherein the aperture stop having a variable aperture diameter is disposed in the third in order to achieve a constant value in the entire zoom-out area. Between the lens group and the fourth lens group. The zoom lens for projection according to claim 1 or 2, wherein the first lens group is composed of four lenses in order from the magnification side, and the four lenses pass through a lens having positive refractive power and have a negative lens. A refractive power lens, a lens having a negative refractive power, and a lens having a negative refractive power. 6. The projection zoom lens according to claim 2, wherein the second lens group is composed of two lenses in order from the magnification side, the two lenses are transmitted through a lens having a negative refractive power, and have A lens with positive refractive power. a projection type display device comprising: a light source, a light valve, an illumination optical unit that guides a light beam from the light source to the light valve, and any one of the above-mentioned items of items 1-5 to 6 The projection is zoomed through, and the light beam from the light source is optically modulated by the light valve and projected onto the screen by the zoom lens. ~ 28 MmQ70 四、指定代表圖 (一） 本案指定代表圖為：圖（1 )。 (二） 本代表圖之元件符號簡單說明： 面間隔D1〜D31 透鏡L1〜L15 孔徑3 透鏡組G1〜G6 曲率半徑R1〜R32 圖像顯示面1 光軸Z 2IV. Designation of Representative Representatives (1) The representative representative of the case is: Figure (1). (2) The symbol of the symbol of the representative figure is briefly described: face spacing D1~D31 lens L1~L15 aperture 3 lens group G1~G6 radius of curvature R1~R32 image display surface 1 optical axis Z 2