CN203882076U - Projector and projection lens - Google Patents
Projector and projection lens Download PDFInfo
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- CN203882076U CN203882076U CN201420115559.4U CN201420115559U CN203882076U CN 203882076 U CN203882076 U CN 203882076U CN 201420115559 U CN201420115559 U CN 201420115559U CN 203882076 U CN203882076 U CN 203882076U
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- lens
- optical system
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- projection
- catoptron
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Abstract
The utility model comprises a projector. The projector comprises an image light source generation device and a projection lens, wherein the image light source generation device is used for generating an image light beam, the projection lens comprises an optical relaying system and an optical projection system, the optical relaying system is used for receiving the image light beam, and the optical projection system comprises at least one lens and a reflection lens. When the image light source generation device generates the image light beam, the image light beam passes through the optical relaying system, penetrates through the at least lens and is reflected by the reflection lens, and the reflected image light beam further penetrates through the at least lens, is shot out from the projection lens and is projected to an imaging face. The utility model further discloses a structure of the projection lens of the projector.
Description
Technical field
The utility model is relevant with optical projection apparatus; Refer to especially a kind of projector and projection lens.
Background technology
Along with the progress of video technique, projector is more and more universal, its in order to by image definition be presented on projection lens one of the core parts especially on screen.
And along with the restriction of usage space; for also reaching in little space the effect of clear projection; the projection lens of projector designs toward the direction of short out-of-focus projection camera lens gradually; but for making short distance also can have good projection, short-focus lens is conventionally understood usage quantity lens more and that volume is larger and is reached the short burnt while effect of high optical power again.
Thus, not only volume is large and Heavy Weight for existing short out-of-focus projection camera lens, and cannot reach now the miniaturization of advocating and light-weighted design, more because of interior lens not only more than but weigh, stand man-hour therefore must expend longer group while making, and its material cost is also more expensive.
Comprehensively the above can be learnt, known projector and the optical design of projection lens are not attained perfect yet, and the part that haves much room for improvement.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of projector and projection lens thereof, effectively reduced volume and reducing costs, and there is high optical performance.
Edge is to reach above-mentioned purpose, and the utility model provides a kind of projector, includes an image light-source generation device and a projection lens, and wherein this image light-source generation device is to produce an image strip.This projection lens is to receive this image strip and be projected to an imaging surface, and include from a side that approaches this image light-source generation device to a relay optical system and a projection optical system of sequentially arranging away from a side of image light-source generation device, this relay optical system is in order to receive this image strip, this projection optical system is in order to the direction projection toward this imaging surface by this image strip, and include at least a slice lens and a catoptron, this at least a slice lens between this catoptron and this relay optical system, and this at least a slice lens there is one first optical side and one second optical side, and this first optical side this second optical side approaches this relay optical system.
Wherein, this image strip that this image light-source generation device produces, reflects by this catoptron, and leaves this at least after a slice lens by this first optical side, penetrates the part lens of this relay optical system, then is projected to this imaging surface.
Wherein, this image strip that this image light-source generation device produces, in the last a slice lens that pass through before being projected to this imaging surface, the optical path before this image strip is reflected by this catoptron, the optical path after being reflected by this catoptron with this image strip is non-intersect.
Wherein, this image strip that this image light-source generation device produces, the area passing through while ejaculation by this first optical side, is not more than 1/2 of this first optical side total area.
Thus, in the time that this image light-source generation device produces this image strip, this image strip is by this relay optical system, and this first optical side is injected at least a slice lens certainly, leave this at least a slice lens by this second optical side again, and by after this catoptron reflection, this image strip is injected this at least a slice lens once again from this second optical side, leave this at least a slice lens by this first optical side again, and be projected to this imaging surface.
According to above-mentioned design, the utility model also provides a kind of projection lens, include a relay optical system and a projection optical system, this projection optical system includes at least a slice lens and a catoptron, and this at least a slice lens between this catoptron and this relay optical system, and this at least a slice lens there is one first optical side and one second optical side, and this first optical side this second optical side approach this relay optical system.
Wherein, between 0.5 times to 1.5 times, the mirror footpath of the mirror footpath of this catoptron eyeglass in maximum mirror footpath in this relay optical system and this projection optical system.
Wherein, more meet the following conditions :-20≤CRA≤20, wherein, the chief ray angle (Chief ray angle) that CRA is this projection lens.
Wherein, this catoptron towards this at least the minute surface of a slice lens be concave mirror.
Wherein, this catoptron towards this at least the minute surface of a slice lens be non-spherical surface.
Wherein, the lens numbers of this relay optical system is greater than the lens numbers of this projection optical system.
Thus, when a light beam is by this relay optical system, and this first optical side is injected this at least a slice lens certainly, leave this at least a slice lens by this second optical side again, and by after this catoptron reflection, this light beam is injected this at least a slice lens once again from this second optical side, then leaves this at least a slice lens by this first optical side.
Thus, by the design of above-mentioned projector and projection lens thereof, the object that just can effectively reach reduced volume and reduce costs has advantages of high optical performance simultaneously.
Brief description of the drawings
For being illustrated more clearly in the utility model, below in conjunction with preferred embodiment and coordinate accompanying drawing to be described in detail as follows, wherein:
Fig. 1 is the Organization Chart of the utility model projector;
Fig. 2 is the structural drawing of the utility model the first preferred embodiment projection lens;
Fig. 3 disclose image strip by projection lens projects to imaging surface;
Fig. 4 is the structural drawing of the utility model the second preferred embodiment projection lens.
Embodiment
Shown in please refer to the drawing 1, be the projector 100 of the utility model one preferred embodiment, it includes an image light-source generation device 10 and a projection lens 20.The image information that this image light-source generation device 10 is originated in order to read an image, and there is a slice prism F, and pass through the image strip P of this prism F according to one of the image information generation correspondence reading.This projection lens 20 is in order to receive this image strip P and be projected to an imaging surface after the optical processing of desired effects.This projection lens 20 includes from a side that approaches this image light-source generation device 10 to a relay optical system 22 and a projection optical system 24 of sequentially arranging away from a side of image light-source generation device 10.Wherein:
Refer to Fig. 2, in the present embodiment, this relay optical system 22 includes 11 lens L1-L11 (comprising individual layer lens L1-L2, L5-L11 and compound lens L3, L4), its function is to receive this image strip P, and conducts to this projection optical system 24 according to the optical effect of institute palpus.Certainly,, on reality is implemented, its number of lenses and lens shape, not as limit, also can carry out corresponding adjustment and change according to the demand of different optical design.
Continuous Fig. 1 and Fig. 2 of consulting, this projection optical system 24 includes a lens group G and a catoptron R, this lens group G is between this catoptron R and this relay optical system 22, and include two lens L12, L13 (comprising individual layer lens L13 and compound lens L12), and this lens group G has one first optical side S1 and one second optical side S2, and this first optical side S1 this second optical side S2 approach this relay optical system 22.This catoptron R is concave mirror for non-spherical surface towards the minute surface of this lens group G, and the mirror footpath of this catoptron R (go up the distance between holding below) is in this relay optical system 22 and this projection optical system 24 between 0.5 times to 1.5 times, the mirror footpath of the lens in maximum mirror footpath.Certainly,, on reality is implemented, this catoptron R also can use spherical mirror surface or other free form surfaces instead according to different optical demand towards the minute surface of this lens group G.In addition, in the present embodiment, the mirror footpath of this catoptron R is that the mirror footpath of the lens L11 in 62 millimeters and maximum mirror footpath is 80 millimeters.In other words, the mirror footpath of this catoptron R is 0.775 times of mirror footpath of the lens L11 in maximum mirror footpath;
In addition, this projection lens will meet following condition:
-20≤CRA≤20
Above-mentioned CRA is the chief ray angle (Chief ray angle) of this projection optical system 24.In the present embodiment, on the test position T shown in Fig. 2, detecting the measured chief ray angle being worth when 1.0 (i.e. edge) at standard field domain (Normalized Field) is 7.542.
Thus, refer to Fig. 3, and continuous Fig. 1 and Fig. 2 of consulting, in the time that this image light-source generation device 10 produces this image strip P, this image strip P enters this projection lens 20, and first by this relay optical system 22, and this first optical side S1 injects this lens group G certainly, leave this lens group G by this second optical side S2 again, and by after the mirror-reflection of this catoptron R, this image strip P injects this lens group G once again from this second optical side S2, leave this lens group G by this first optical side S1 again, and penetrate in this relay optical system 22 and approach most after the eyeglass L11 of this projection optical system, penetrate and be projected to a cloth curtain 200 (being imaging surface) from this projection lens 20 again.And must it should be noted that, reflect this image strip P and this lens group G is repeated to penetrate by this image strip P the design that reaches secondary optics effect by the catoptron R of this above-mentioned projection optical system, even if contract lenses size also can reach the design of high optical performance effectively with volume, and can effectively reach the effect of short Jiao and miniaturization.
In addition, the quantity of the optical element of this relay optical system 22 of the present utility model (being lens L1-L11) is greater than the optical element (being lens L12-L13 and catoptron R) of this projection optical system 24 as seen from Figure 2, and the object of this design be can be for this image strip P when this relay optical system 22, can produce good optical effect, and when short out-of-focus projection can be provided, still can there is good projection imaging effect.
Moreover, when this image strip P that this image light-source generation device 10 produces is penetrated by this first optical side S1, pass through the area of this first optical side (being the minute surface S of lens L12 towards this relay optical system 22) of this lens group G, be not more than 1/2 of this minute surface S total area.In addition, this image strip P is in penetrating the front last a slice lens that jointly pass through of this projection lens 20 (being lens L11), by the optical path before this catoptron R reflection, with not interlaced by the optical path after this catoptron R reflection, and then can avoid optical interference to promote the quality of projection imaging.
It is worth mentioning that, for improving optical usefulness more effectively, also as can be as shown in Figure 4, in the situation that not affecting optical effect, the eyeglass of the part lens in this relay optical system 22 ' (being lens L8 ', L9 ', L10 ') is cut or ground, make can not penetrated these lens L8 ', L9 ', L10 ' by this image strip after this catoptron R reflection, just can effectively avoid the situation of optical interference to occur, and then reach the effect of slimming and improving optical usefulness.
The foregoing is only the better possible embodiments of the utility model, the equivalence that every application the utility model instructions and claim are done changes, and ought to be included within the scope of claim of the present utility model.
Claims (10)
1. a projector, is characterized in that, comprising:
One image light-source generation device, produces an image strip; And
One projection lens, receive this image strip and be projected to an imaging surface, and include from a side that approaches this image light-source generation device to a relay optical system and a projection optical system of sequentially arranging away from a side of this image light-source generation device, wherein this relay optical system is in order to receive this image strip, this projection optical system is in order to the direction projection toward this imaging surface by this image strip, and include at least a slice lens and a catoptron, this at least a slice lens between this catoptron and this relay optical system, and this at least a slice lens there is one first optical side and one second optical side, and this first optical side this second optical side approaches this relay optical system,
Thus, in the time that this image light-source generation device produces this image strip, this image strip is by this relay optical system, and this first optical side is injected this at least a slice lens certainly, leave this at least a slice lens by this second optical side again, and by after the reflection of this catoptron, this image strip is injected this at least a slice lens once again from this second optical side, then leave this at least a slice lens and be projected to this imaging surface by this first optical side.
2. projector as claimed in claim 1, is characterized in that, this image strip that wherein this image light-source generation device produces, reflect by this catoptron, and leave this at least after a slice lens by this first optical side, penetrate the part lens of this relay optical system, then be projected to this imaging surface.
3. projector as claimed in claim 1 or 2, it is characterized in that, this image strip that wherein this image light-source generation device produces, in the last a slice lens that pass through before being projected to this imaging surface, optical path before this image strip is reflected by this catoptron, the optical path after being reflected by this catoptron with this image strip is non-intersect.
4. projector as claimed in claim 1, is characterized in that, this image strip that wherein this image light-source generation device produces, and the area passing through while ejaculation by this first optical side, is not more than 1/2 of this first optical side total area.
5. a projection lens, include a relay optical system and a projection optical system, this projection optical system includes at least a slice lens and a catoptron, and this at least a slice lens between this catoptron and this relay optical system, and this at least a slice lens there is one first optical side and one second optical side, and this first optical side this second optical side approaches this relay optical system, it is characterized in that:
When an image strip is by this relay optical system, and this first optical side is injected this at least a slice lens certainly, leave this at least a slice lens by this second optical side again, and by after this catoptron reflection, this light beam is injected this at least a slice lens once again from this second optical side, then leaves this at least a slice lens by this first optical side.
6. projection lens as claimed in claim 5, is characterized in that, wherein between 0.5 times to 1.5 times, the mirror footpath of the mirror footpath of this catoptron eyeglass in maximum mirror footpath in this relay optical system and this projection optical system.
7. projection lens as claimed in claim 5, is characterized in that, more meets the following conditions :-20≤CRA≤20, wherein, the chief ray angle that CRA is this projection lens.
8. projection lens as claimed in claim 5, is characterized in that, wherein this catoptron towards this at least the minute surface of a slice lens be concave mirror.
9. projection lens as claimed in claim 8, is characterized in that, wherein this catoptron towards this at least the minute surface of a slice lens be non-spherical surface.
10. projection lens as claimed in claim 5, wherein the lens numbers of this relay optical system is greater than the lens numbers of this projection optical system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420115559.4U CN203882076U (en) | 2014-03-14 | 2014-03-14 | Projector and projection lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420115559.4U CN203882076U (en) | 2014-03-14 | 2014-03-14 | Projector and projection lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203882076U true CN203882076U (en) | 2014-10-15 |
Family
ID=51682559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420115559.4U Expired - Fee Related CN203882076U (en) | 2014-03-14 | 2014-03-14 | Projector and projection lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203882076U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785553A (en) * | 2014-12-17 | 2016-07-20 | 深圳市亿思达科技集团有限公司 | Miniaturizable short-focus projection lens |
| CN109143531A (en) * | 2017-06-16 | 2019-01-04 | 昭朗精密工业有限公司 | Projector and its projection lens |
| CN112180669A (en) * | 2019-07-03 | 2021-01-05 | 王志煌 | Projection device |
-
2014
- 2014-03-14 CN CN201420115559.4U patent/CN203882076U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785553A (en) * | 2014-12-17 | 2016-07-20 | 深圳市亿思达科技集团有限公司 | Miniaturizable short-focus projection lens |
| CN105785553B (en) * | 2014-12-17 | 2020-09-04 | 深圳市亿思达科技集团有限公司 | Small short-focus projection lens |
| CN109143531A (en) * | 2017-06-16 | 2019-01-04 | 昭朗精密工业有限公司 | Projector and its projection lens |
| CN112180669A (en) * | 2019-07-03 | 2021-01-05 | 王志煌 | Projection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 Termination date: 20200314 |