CN203133401U - Projection optical system - Google Patents
Projection optical system Download PDFInfo
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- CN203133401U CN203133401U CN 201320089991 CN201320089991U CN203133401U CN 203133401 U CN203133401 U CN 203133401U CN 201320089991 CN201320089991 CN 201320089991 CN 201320089991 U CN201320089991 U CN 201320089991U CN 203133401 U CN203133401 U CN 203133401U
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Abstract
本实用新型涉及一种投影光学系统，包括投影光学系统像面、折射投影光学系统、第二反射光学系统以及第一反射光学系统；投影光学系统像面、折射投影光学系统以及第二反射光学系统依次设置在同一光路上；第一反射光学系统设置在经第二反射光学系统反射后的所形成的反射光的光路上。本实用新型提供了一种具有光路简单、投影畸变小、色差小、成像清晰、投影亮度均匀、结构紧凑、体积小的投影用光学系统。
The utility model relates to a projection optical system, comprising a projection optical system image plane, a refraction projection optical system, a second reflective optical system and a first reflective optical system; the projection optical system image plane, a refractive projection optical system and a second reflective optical system They are sequentially arranged on the same optical path; the first reflective optical system is arranged on the optical path of the reflected light formed after being reflected by the second reflective optical system. The utility model provides an optical system for projection with simple optical path, small projection distortion, small color difference, clear imaging, uniform projection brightness, compact structure and small volume.
Description
Technical field
The utility model belongs to the projection display technique field, relates to a kind of projection optical system.
Background technology
Projector's kind in the market is very complicated, and general projectors will realize that 100 inches pictures need about 3 meters of projector distances.Yet, along with the demand in science and technology development and market, the projector of many unique functions has appearred on the market, and short projector distance, ultrashort projector distance are boundless one types of application prospect at present.Because this type of projector can be realized bigger projection size in less space, and have technical characterstics such as shade is little, therefore, this type of projector is in more occasion, as having good application in fields such as business meetings, educational training, commercial exhibitions.Short out-of-focus projection instrument becomes product of greatest concern on the market in recent years, more manufacturer is the projector market of short Jiao of gambling game, played with dice under a bowl, ultrashort Jiao, ultrashort projector distance in succession.HCP-A8 as Hitachi can realize that 100 cun the ultrashort burnt product P JWX4130N of projection size, Ricoh not only can project 48 inches images at projector distance 117mm at the 400mm projector distance, and is the product that the whole world is the smallest and the most exquisite at present, weight is the lightest.And general short distance projection optical system will realize 80 cun projection size, and then the projector distance between projection optical system and the projection screen is about 300mm.At present, Sanyo has a LP-XL500 can realize 80 cun projection size at the 80mm projector distance.Short projector distance in the foreign market, the projector optical system light path design of ultrashort projector distance generally adopt flake projection-type light channel structure, catadioptric light channel structure, total reflection light line structure at present.Existing short distance, the comparatively serious phenomenon of ultrashort out-of-focus projection instrument ubiquity distortion, severe distortion appears in the picture edge of projection easily.
The utility model content
In order to solve the above-mentioned technical matters that exists in the background technology, the utility model provides the projection optical system that a kind of light channel structure is compact and can reduce projector distance greatly.
Technical solution of the present utility model is: the utility model provides a kind of projection optical system, and its special character is: described projection optical system comprises projection optical system image planes, refraction projection optical system, second reflective optics and first reflective optics; Described projection optical system image planes, refraction projection optical system and second reflective optics are successively set on the same light path; Described first reflective optics is arranged on the formed catoptrical light path after the reflection of second reflective optics.
Above-mentioned refraction projection optical system comprises preceding fixed mirror group, varifocal mirror group and back fixed mirror group; Described projection optical system image planes, back fixed mirror group, varifocal mirror group and preceding fixed mirror group are successively set on the same light path.
Fixed mirror group, varifocal mirror group and back fixed mirror group include one or more lens compositions before above-mentioned; Described lens are provided with diffracting layer.
Lens before above-mentioned in fixed mirror group, varifocal mirror group and the back fixed mirror group are spherical optics system, refracting sphere plane system or aspheric optical system.
When the lens before above-mentioned in fixed mirror group, varifocal mirror group and the back fixed mirror group were the refracting sphere plane system, described lens were free form surface optical systems.
Above-mentioned first reflective optics is aspherics system, free form surface optical system or plane mirror optical system.
Above-mentioned second reflective optics is aspherics system, free form surface optical system or plane mirror optical system.
Above-mentioned first reflective optics and second reflective optics all are aspherics system, free form surface optical system or plane mirror optical system.
Above-mentioned projection optical system also comprises picture side's telecentric optical system, and described picture side telecentric optical system, projection optical system image planes and refraction projection optical system are on the same light path successively.
Above-mentioned projection optical system also comprises the projection screen that is arranged on the formed catoptrical light path after the reflection of first reflective optics.
The utility model has the advantages that:
The utility model relates to projector with 3 kinds of optical systems, can be implemented in the 80mm projector distance equally and realize 80 cun projection size requirement, thereby significantly reduced projector distance, and characteristics such as this projection optical system has, and light path is simple, projection distortion is little, aberration is little, imaging is clear, projection brightness is even, compact conformation, volume are little, has the focusing function simultaneously, to adapt to the needs of different projector spaces.
The gordian technique that adopts in the utility model:
1. adopt the telecentric beam path in image space Design Mode in the light path design, improved the even of projected picture brightness;
2. increase diffraction surfaces in the light path design, reduced projection aberration problem;
3. increase aspheric surface and free form surface in the light path design, improved projected picture sharpness, reduced optical system distortion, shortened projector distance, make light path design simpler simultaneously.
By adopting top gordian technique, make this projector optical system can be implemented in limited space and provide big picture multimedia presentation for the public arena, allow the narrow space still can flexible Application, eliminated the projection shadow problem simultaneously, make meeting, demonstration, training become easily efficient again.
Description of drawings
Fig. 1 is the first example structure synoptic diagram of projection optical system provided by the utility model;
Fig. 2 is the second example structure synoptic diagram of projection optical system provided by the utility model;
Fig. 3 is the 3rd example structure synoptic diagram of projection optical system provided by the utility model;
Wherein:
The 1-projection screen; The 2-projection optical system; 3-first reflective optics; 4-second reflective optics; The 5-dioptric system; Fixed mirror group before the 5a-; 5b-varifocal mirror group; Fixed mirror group behind the 5c-; 6-projection optical system image planes.
Embodiment
Referring to Fig. 1 or Fig. 2, the utility model provides a kind of projection optical system, and this projection optical system comprises projection optical system image planes 6, dioptric system 5, second reflective optics 4 and first reflective optics 3; Projection optical system image planes 6, dioptric system 5 and second reflective optics 4 are successively set on the same light path; First reflective optics 3 is arranged on the formed catoptrical light path after 4 reflections of second reflective optics.
Fixed mirror group 5a, varifocal mirror group 5b and back fixed mirror group 5c before dioptric system 5 comprises; Projection optical system image planes 6, back fixed mirror group 5c, varifocal mirror group 5b and preceding fixed mirror group 5a are successively set on the same light path.
Preceding fixed mirror group 5a, varifocal mirror group 5b and back fixed mirror group 5c include one or more lens and form (preferably all being made up of three lens combination); Lens are provided with diffracting layer, form diffraction surfaces; Lens among preceding fixed mirror group 5a, varifocal mirror group 5b and the back fixed mirror group 5c are spherical optics system, refracting sphere plane system or aspheric optical system; When the lens among preceding fixed mirror group 5a, varifocal mirror group 5b and the back fixed mirror group 5c were the refracting sphere plane system, lens were free form surface optical systems.Can change the size of projected picture by the position of mobile varifocal mirror group 5b.In order to have increased diffraction surfaces in the corrective system aberration dioptric system 5, belong to and roll over the commingled system of spreading out, each mirror group all adopts the spherical optics system in the cost dioptric system 5 in order to reduce simultaneously, but dioptric system 5 is not limited to this structure, also can all adopt the refracting sphere plane system or increase the aspheric mirror group.
Projection optical system also comprises picture side's telecentric optical system, is in successively on the same light path as square telecentric optical system, projection optical system image planes 6 and dioptric system 5.Simultaneously, projection optical system also comprises the projection screen 1 that is arranged on the formed catoptrical light path after 3 reflections of first reflective optics.
Principle of work of the present utility model is: projection optical system principle of work general introduction: Projection Display chip DMD or LCOS are installed on projection optical system image planes 6 positions, target image on the Projection Display chip is imaged in projection screen 1 through refraction projection optical system 5, second reflective optics 4, first reflective optics 3, form the target image information of amplifying.
Projection optical system 2 is made up of first reflective optics 3, second reflective optics 4, dioptric system 5, and the correction to the projection optical system aberration is finished in first reflective optics 3, second reflective optics 4, dioptric system 5 actings in conjunction.
For reducing the optical system distortion, second reflective optics 4 adopts the aspheric surface design, has positive diopter in this light path design; For reducing production cost, first reflective optics 3 adopts plane mirror.First reflective optics 3, second reflective optics 4 are not limited to this project organization pattern, wherein, the any materials that first reflective optics, second reflective optics all can adopt aspheric surface, free form surface, plane mirror etc. to have luminous reflectanc designs, or one of them adopts aspheric surface, free form surface, plane mirror etc. to have any materials of luminous reflectanc, or has the mode of composite design in twos between any materials of luminous reflectanc for aspheric surface, free form surface, plane mirror etc.
Referring to Fig. 3, projection optical system 2 also can adopt total-reflection type to focus apart from the light path design pattern, be made up of first reflective optics 3, second reflective optics 4, dioptric system 5, the correction to the projection optical system aberration is finished in first reflective optics 3, second reflective optics 4, dioptric system 5 actings in conjunction.First, second and third reflective optics all adopts the aspheric surface design, but is not limited thereto structure, also can adopt the light path design pattern of free form surface or free form surface and aspheric surface combination.
This projection optical system not only can be used for the projector field, and can be used for the projection TV field, is particularly useful for orthographic projection television.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320089991 CN203133401U (en) | 2013-02-27 | 2013-02-27 | Projection optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320089991 CN203133401U (en) | 2013-02-27 | 2013-02-27 | Projection optical system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203133401U true CN203133401U (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320089991 Expired - Lifetime CN203133401U (en) | 2013-02-27 | 2013-02-27 | Projection optical system |
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| Country | Link |
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| CN (1) | CN203133401U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103135238A (en) * | 2013-02-27 | 2013-06-05 | 中国科学院西安光学精密机械研究所 | Projection optical system |
| CN109946910A (en) * | 2017-12-21 | 2019-06-28 | 宁波舜宇车载光学技术有限公司 | Vehicle-mounted optical projection system |
| CN110456599A (en) * | 2018-05-08 | 2019-11-15 | 青岛海信激光显示股份有限公司 | Projection imaging system and laser projection device |
-
2013
- 2013-02-27 CN CN 201320089991 patent/CN203133401U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103135238A (en) * | 2013-02-27 | 2013-06-05 | 中国科学院西安光学精密机械研究所 | Projection optical system |
| CN109946910A (en) * | 2017-12-21 | 2019-06-28 | 宁波舜宇车载光学技术有限公司 | Vehicle-mounted optical projection system |
| CN110456599A (en) * | 2018-05-08 | 2019-11-15 | 青岛海信激光显示股份有限公司 | Projection imaging system and laser projection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |