CN206818965U

CN206818965U - A kind of high-resolution projection lens for DLP engineerings projector

Info

Publication number: CN206818965U
Application number: CN201720758544.3U
Authority: CN
Inventors: 李升辉; 崔小强; 潘海俊; 王源; 王龙; 彭军
Original assignee: Hubei Long Ocean Mdt Infotech Ltd
Current assignee: Hubei Long Ocean Mdt Infotech Ltd
Priority date: 2017-06-27
Filing date: 2017-06-27
Publication date: 2017-12-29
Anticipated expiration: 2027-06-27

Abstract

The utility model discloses a kind of high-resolution projection lens for DLP engineerings projector, including first fixed group, the first zoom group, the second zoom group, compensation group and fix group afterwards；First fixed group is made up of front lens one, front lens two, front lens three and front lens four, and front lens three and front lens four form balsaming lens；First zoom group is made up of the first Zoom lens and the second Zoom lens, and the first Zoom lens and the second Zoom lens form balsaming lens；The second described zoom group is made up of the 3rd Zoom lens and the 4th Zoom lens；Compensation group is made up of offset lens one and offset lens two, and offset lens one and offset lens two form balsaming lens；Fix group afterwards to be made up of rear fixed lens one, rear fixed lens two, rear fixed lens three and rear fixed lens four, rear fixed lens one and rear fixed lens two form balsaming lens；The utility model has the advantages of high-resolution, image space telecentricity, auto-focusing, long reach, low distortion, low cost and miniaturization.

Description

A kind of high-resolution projection lens for DLP engineerings projector

Technical field

The utility model belongs to field of projector, more particularly to a kind of 1920*1200 high-resolution DLP engineerings that are used for project The big visual field long reach continuous vari-focus auto-focusing high-resolution projection lens of machine.

Background technology

In recent years, digital projection Display Technique fast development, the Projection Display production based on the technologies such as LCD, LCOS, DLP Industry is developed rapidly.Wherein, DLP projection display techniques are by its abundant color, the picture of high quality, the figure of high brightness The display of picture and high-contrast is developed rapidly, is widely used in digital cinema theatre.

Core component in DLP technologies is DMD digital picture chips, is developed by American TI Company and is monopolized, it is by a lot The digital micro-mirror composition of matrix arrangement, during work, micro mirror can rotate 12 ° of openings, by the reflection from illumination path and take Band signal passes through in projection lens projects to giant-screen.

In order to match the incident angle of dmd chip, the uniformity of projection display picture, rational deployment projector optical are improved Engine, the illumination path of engineering projector use TIR prism more, and this just needs the throwing of the long reach matched with TIR prism Shadow camera lens.

Such DLP system uses TIR prism, and continuous magnification lens need to retain longer back work distance when matching From ensureing image space telecentricity, considerably increase the control difficulty of lens length and off-axis aberration.

It is more in existing publication to improve the image quality of system using aspheric surface technology, but considerably increase system Difficulty of processing and cost.

Utility model content

The purpose of this utility model is to provide a kind of three constituent element continuous vari-focus auto-focusing high-resolution projection lens.

Technical scheme is used by the utility model solves its technical problem：A kind of height for DLP engineerings projector Resolution projection camera lens, including set gradually along optical axis direction first fixed group, the first zoom group, the second zoom group, compensation group With five parts of rear fixed group；The front lens one by the positive sphere of falcate of first fixed group as auto-focusing lens group, falcate The front lens four of front lens three and the positive sphere of falcate that the front lens two of negative sphere, falcate bear sphere forms, before described Lens three and front lens four form balsaming lens；The first described zoom group is by the first Zoom lens of the positive sphere of falcate and curved The moon, shape bore the second Zoom lens composition of sphere, and the first described Zoom lens and the second Zoom lens form balsaming lens；Institute The 4th Zoom lens that the second zoom group stated is born sphere by the 3rd Zoom lens and falcate of lenticular positive sphere form；Institute The offset lens two that the compensation group stated is born sphere by the offset lens one and double concave of the positive sphere of falcate forms, described compensation Lens one and offset lens two form balsaming lens；Described latter fixed group is born the rear fixed lens one, double of sphere by falcate The rear fixed lens of the rear fixed lens two of the positive sphere of convex, the lenticular just rear fixed lens three and the positive sphere of convexo-plane of sphere Four compositions, described rear fixed lens one and rear fixed lens two form balsaming lens.

A kind of described high-resolution projection lens for DLP engineerings projector, fixed group before it, the first zoom group, The total length of second zoom group, compensation group and rear fixed group camera lens is 170mm, and wherein the optics bore of front lens one is maximum, is 87mm, back work distance are 45mm from BFL.

A kind of described high-resolution projection lens, its optical center visual field MTF ＞ 0.65 in 40 lp/mm, edge regards Field ＞ 0.5 in 40 lp/mm, distort ＜ 2%, peripheral field relative illumination ＞ 90%.

The beneficial effects of the utility model are：Using three constituent element coordinated type continuous vari-focus, hence it is evident that improve projection lens Image quality, reduce the apparent size of projection lens；The good imaging quality of camera lens, distortion are small；1 ° of image space telecentricity ＜, edge Visual field relative illumination is high, and uniformity is good；The image planes size of camera lens is big, disclosure satisfy that engineering projector translates up and down to camera lens Particular/special requirement；Camera lens has automatic focusing function, can automatically be focused, made according to the distance between camera lens and giant-screen Image imaging clearly on giant-screen；Camera lens is taken from Chengdu light glass storehouse, zoom curve using spherical lens and material Easy to process smoothly without flex point, cost is relatively low, suitable for producing in enormous quantities；The high resolution of camera lens, 1920* can be applied to 1200 high-resolution projectors, and the particular/special requirement that engineering projector translates up and down can be met.

Brief description of the drawings

Fig. 1 is optical schematic diagram of the present utility model；

Fig. 2 is light path X-Y scheme of the present utility model；

MTF schemes when Fig. 3 is the utility model short focus end@50lp/mm；

MTF schemes when Fig. 4 is burnt end@50lp/mm in the utility model；

MTF schemes when Fig. 5 is the utility model focal length end@50lp/mm；

Fig. 6 is the utility model short focus end point range figure；

Fig. 7 is burnt end point range figure in the utility model；

Fig. 8 is the utility model focal length end point range figure；

Fig. 9 is the utility model zoom curve map（In figure, series 1 is the distance between preceding fixed group and first zoom group Change, series 2 are that the distance between the first zoom group and the second zoom group change, series 3 be the second zoom group and compensation group it Between distance change, series 4 is the change of the distance between compensation group and rear fixed group）.

Each reference is：1-front lens one, 2-front lens two, 3-front lens three, 4-front lens four, 5-the first Zoom lens, the 6-the second Zoom lens, the 7-the three Zoom lens, the 8-the four Zoom lens, 9-offset lens one, 10-mend Repay lens two, 11-rear fixed lens one, 12-rear fixed lens two, 13-rear fixed lens three, 14-rear fixed lens four.

Embodiment

The utility model discloses a kind of three constituent element continuous vari-focus auto-focusing high-resolution projection lens, including arrange successively 14 spherical lenses of row, fixed group, the first zoom group, five parts of the second zoom group, compensation group and rear fixed group before being divided into, Wherein preceding fixed group includes front lens 1, front lens 22, front lens 33, front lens 44, and the first zoom group includes first and become Times Zoom lens 6 of lens 5 and second, the second zoom group include the 3rd Zoom lens 7 and the 4th Zoom lens 8, and compensation group includes Offset lens 1 and offset lens 2 10, rear fixed group fix lens 1, fix lens 2 12 afterwards, be rear fixed saturating after including Mirror 3 13 and rear fixed lens 4 14；Wherein preceding fixed group is used as auto-focusing lens group.

Described preceding fixed group is negative lens group, and focal length is：-85mm<f1<- 70mm, by the front lens of the positive sphere of falcate One 1, falcate bears the front lens 22 of sphere, falcate bears the front lens 33 of sphere and the front lens 44 of the positive sphere of falcate Composition, described front lens 33 and front lens 44 form balsaming lens.

First zoom group and the second zoom group are positive lens groups.

The first described zoom group focal length is：50mm<f2<100mm, by the He of the first Zoom lens 5 of the positive sphere of falcate The second Zoom lens 6 that falcate bears sphere form, and the first described Zoom lens 5 and the second Zoom lens 6 form gluing thoroughly Mirror.

The second described zoom group focal length is：60mm<f3<70mm, by the 3rd Zoom lens 7 of lenticular positive sphere and curved The 4th Zoom lens 8 that month shape bears sphere form.

Described compensation group is negative lens group, and focal length is：-40mm<f4<- 30mm, by the offset lens of the positive sphere of falcate 1 and double concave bear the offset lens 2 10 of sphere and form, described offset lens 1 and offset lens 2 10 form it is glued thoroughly Mirror.

Described rear fixed group is positive lens groups, and focal length is：20mm<f5<35mm, the rear fixation that sphere is born by falcate are saturating Mirror 1, the rear fixed lens 2 12 of lenticular positive sphere, the rear fixed lens 3 13 and the positive ball of convexo-plane of lenticular positive sphere The rear fixed lens 4 14 in face form, and described rear fixed lens 1 and rear fixed lens 2 12 form balsaming lens.

The utility model being made up of first fixed group, the first zoom group, the second zoom group, compensation group and rear fixed group camera lens The optics bore of projection lens optical dimensions≤Φ 87mm × 170mm, wherein front lens 1 is maximum, and its effective optics bore is 87mm, back work distance are 45mm from BFL.Optical center visual field MTF ＞ 0.65 in 40 lp/mm, peripheral field is in 40 lp/mm When ＞ 0.5, distort ＜ 2%, peripheral field relative illumination ＞ 90%.

Following table gives the design parameter of the utility model lens optical system.

The utility model projection lens is applied to 0.65inch DMD DLP projector, and Lens are small, in light weight, depending on Field scope is big, and good imaging quality, distortion is reasonable, and peripheral field relative illumination is higher；Easy to process, cost is relatively low, suitable for large quantities of Amount production.

Above-described embodiment only illustrative principle of the present utility model and its effect, and the embodiment that part uses, For the person of ordinary skill of the art, on the premise of not departing from the utility model and creating design, if can also make Dry modification and improvement, these belong to the scope of protection of the utility model.

Claims

A kind of 1. high-resolution projection lens for DLP engineerings projector, it is characterised in that：Including being set successively along optical axis direction Put first fixed group, the first zoom group, the second zoom group, compensation group and fix group afterwards；

Before sphere being born as first fixed group of auto-focusing lens group by the front lens one (1) of the positive sphere of falcate, falcate Lens two（2）, falcate bear sphere front lens three（3）With the front lens four of the positive sphere of falcate（4）Composition, described is preceding Mirror three（3）With front lens four（4）Form balsaming lens；

The first described zoom group by the positive sphere of falcate the first Zoom lens（5）The second zoom that sphere is born with falcate is saturating Mirror（6）Composition, the first described Zoom lens（5）With the second Zoom lens（6）Form balsaming lens；

The second described zoom group by lenticular positive sphere the 3rd Zoom lens（7）The 4th zoom that sphere is born with falcate is saturating Mirror（8）Composition；

Described compensation group by the positive sphere of falcate offset lens one（9）The offset lens two of sphere is born with double concave（10）Group Into described offset lens one（9）With offset lens two（10）Form balsaming lens；

Described latter fixed group is born the rear fixed lens one of sphere by falcate（11）, lenticular positive sphere rear fixed lens two （12）, lenticular positive sphere rear fixed lens three（13）With the rear fixed lens four of the positive sphere of convexo-plane（14）Composition, it is described Rear fixed lens one（11）With rear fixed lens two（12）Form balsaming lens.
A kind of 2. high-resolution projection lens for DLP engineerings projector according to claim 1, it is characterised in that Described first fixed group, the first zoom group, the second zoom group, the total length of compensation group and rear fixed group camera lens be 170mm, wherein The optics bore of front lens one (1) is maximum, is 87mm, back work distance is 45mm from BFL.
A kind of 3. high-resolution projection lens for DLP engineerings projector according to claim 2, it is characterised in that Described optical center visual field the MTF ＞ 0.65 in 40 lp/mm, peripheral field ＞ 0.5 in 40 lp/mm, distort ＜ 2%, side Edge visual field relative illumination ＞ 90%.