CN204302649U - Projector and projection lens thereof - Google Patents
Projector and projection lens thereof Download PDFInfo
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- CN204302649U CN204302649U CN201420439464.8U CN201420439464U CN204302649U CN 204302649 U CN204302649 U CN 204302649U CN 201420439464 U CN201420439464 U CN 201420439464U CN 204302649 U CN204302649 U CN 204302649U
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- projection lens
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Abstract
The utility model, about a kind of projector and projection lens thereof, comprises an image light-source generation device with a projection lens.This projection lens includes a relay optical system and a projection optical system; This relay optical system comprises a focusing optics group and a light-gathering optics group, and this focusing optics group and this light-gathering optics group comprise at least a slice lens respectively; In addition, this focusing optics group moves between this light-gathering optics group and this image light-source generation device; This projection optical system includes a projection lens group and a catoptron, this projection lens group is between this catoptron and this relay optical system, when this image light-source generation device produces this image strip, this image strip is by this relay optical system, and after penetrating this projection lens group, after oppositely penetrating this projection lens group, this imaging surface is projected to through the reflection of this catoptron.
Description
Technical field
The utility model is relevant with optical projection apparatus; Refer to a kind of projector and projection lens thereof especially.
Background technology
Along with the progress of Vision Technology, projector is more and more universal, and it is in order to be presented on projection lens one of core parts especially on screen by image definition.And along with the restriction of usage space; for also can reach the effect of clear projection in little space; 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 understands the more and lens that volume is larger of usage quantity usually to reach the effect of short burnt high optical power again simultaneously.
Thus, existing short out-of-focus projection camera lens is the large and Heavy Weight of volume not only, and cannot reach advocated miniaturization now and light-weighted design, more because of interior lens not only more than but weigh, therefore then must expend longer group and stand man-hour when making, and its material cost also costly.
And be improve above-mentioned shortcoming, then dealer is had to research and develop a kind of back projecting projector, namely be at inner utilization catoptron, the image strip of projector is reflected to be transmitted through on imaging surface, but this kind of machine is due to without focus function, can only be arranged on from the position of imaging surface fixed range on arranging, and according to different projection environment change setting positions, and then its applicability cannot be reduced significantly.Therefore 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 used for providing a kind of projector and projection lens thereof, except can effective reduced volume and reducing costs, has outside high optical performance simultaneously, more can reach the object that adjustment is focused, and then increase the applicability of this projector.
Edge is to reach above-mentioned purpose, and projector that the utility model provides comprises an image light-source generation device and a projection lens.Wherein, this image light-source generation device is in order to produce an image strip.This projection lens in order to receive this image strip and to be projected to an imaging surface, and includes from the side close to this image light-source generation device extremely away from a relay optical system and a projection optical system of the side sequential of this image light-source generation device; This relay optical system includes a focusing optics group and a light-gathering optics group, and this focusing optics group and this light-gathering optics group include at least a slice lens respectively, and this focusing optics group comparatively this light-gathering optics group close to this image light-source generation device; In addition, this focusing optics group is between this light-gathering optics group and this image light-source generation device, and this light-gathering optics group moves back and forth relatively; This projection optical system includes a projection lens group and a catoptron, this projection lens group is between this catoptron and this relay optical system, and this projection lens group has one first optical surface and one second optical surface, and this first optical surface comparatively this second optical surface close to this light-gathering optics group.
According to above-mentioned design, at least a slice lens of this light-gathering optics group are multi-disc lens, and this image strip reflects through this catoptron, and after leaving this projection lens group by this first optical surface, also penetrate the lens of close this projection lens group of part in this light-gathering optics group, then be projected to this imaging surface.
According to above-mentioned design, this image strip before being projected to this imaging surface institute by last a slice lens, the optical path before reflection with reflection after optical path non-intersect.
According to above-mentioned design, the part lens in this light-gathering optics group is asymmetric shape.
According to above-mentioned design, the area passed through when this image strip is penetrated by this first optical surface, is not more than 1/2nd of the area of this first optical surface.
According to above-mentioned design, this projection lens also includes one and covers lens, and this covers lens between this focusing optics group and this image light-source generation device.
According to above-mentioned design, at least a slice lens of this focusing optics group are multi-disc lens, and this focusing optics group also has an aperture, and this aperture is in this focusing optics group wherein between two panels eyeglass.
According to above-mentioned design, the utility model also provides a kind of projection lens, in order to receive an image strip and to be projected to an imaging surface, and includes a relay optical system and a projection optical system.Wherein, this relay optical system includes a focusing optics group and a light-gathering optics group, and this focusing optics group and this light-gathering optics group include at least a slice lens respectively, and this focusing optics group moves relative to this light-gathering optics group.This projection optical system includes a projection lens group and a catoptron, this projection lens group is between this catoptron and this light-gathering optics group, and this projection lens group has one first optical surface and one second optical surface, and this first optical surface comparatively this second optical surface close to this light-gathering optics group.
Thus, when this image light-source generation device produces this image strip, this image strip is sequentially by this focusing optics group and this light-gathering optics group, and inject this projection lens group from this first optical surface, leave this projection lens group by this second optical surface again, and through after the reflection of this catoptron, this image strip injects this projection lens group once again from this second optical surface, after leaving this projection lens group by this first optical surface again, be projected to this imaging surface.
According to above-mentioned design, at least a slice lens of this focusing optics group are multi-disc lens, and are formed with many group focusing mirror groups, and described focusing mirror group moves relative to this light-gathering optics group with the motion track being different from other mirrors group respectively.
According to above-mentioned design, this focusing optics group also has an aperture, and this aperture is in this focusing optics group wherein between two panels eyeglass.
According to above-mentioned design, the part lens in this light-gathering optics group is asymmetric shape.
According to above-mentioned design, this projection lens also includes one and covers lens, and this cover lens comparatively this focusing optics group away from this light-gathering optics group, and this focusing optics group is covered between lens and this light-gathering optics group at this.
According to above-mentioned design, this catoptron is concave surface towards the minute surface of these at least a slice lens.
According to above-mentioned design, this catoptron is non-spherical surface towards the minute surface of these at least a slice lens.
The utility model beneficial effect: thus, through above-mentioned design, just can effectively reduced projection machine volume and reduce costs, make projection lens have high optical performance simultaneously.In addition, more can reach the object making projection lens have adjustment focusing, and then increase the applicability of projector.
Accompanying drawing explanation
Fig. 1 is the Organization Chart of the utility model projector;
Fig. 2 is the structural drawing of the projection lens of the utility model preferred embodiment;
Fig. 3 discloses image strip through projection lens projects to imaging surface;
Fig. 4 A to Fig. 4 D is the graph of relation of object distance and lenticular spacing.
[symbol description]
100 projectors
10 image light-source generation device
P image strip
F prism
20 projection lens
22 relay optical systems
221 these light-gathering optics groups of focusing optics group 222
L1 covers lens L2 ~ L9 lens
24 projection optical systems
G projection lens group
L10, L11 lens
S1 first optical surface S2 second optical surface
R catoptron
200 cloth curtains
D1 ~ D4 distance
Embodiment
For can the utility model be illustrated more clearly in, hereby lift preferred embodiment and coordinate diagram to be described in detail as follows, shown in please refer to the drawing 1 to Fig. 3, be the projector 100 of the utility model one preferred embodiment, it includes image light-source generation device 10 and a projection lens 20.This image light-source generation device 10 in order to read the image information of an Image sources, and has a slice prism F, and produces according to the image information read the image strip P that one of correspondence passes through this prism F.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 the side close to this image light-source generation device 10 to relay optical system 22 and the projection optical system 24 away from the side sequential of image light-source generation device 10.Wherein:
Refer to Fig. 2, in the present embodiment, this relay optical system 22 includes and covers lens L1, focusing optics group 221 and a light-gathering optics group 222 from side to one of the side sequential away from image light-source generation device 10 close to this image light-source generation device 10.This covers lens L1 and is positioned on the position of projection lens 20 closest to this image light-source generation device 10; except can providing optical effect; also can enter among this projection lens 20 in order to blocks dust, the object of other internals of this projection lens 20 of protection can be reached simultaneously.This focusing optics group 221 is between this light-gathering optics group 222 and this image light-source generation device 10, and this light-gathering optics group 222 moves back and forth and reaches the object of adjustment focusing relatively.In the present embodiment, this focusing optics group 221 comprises a four lens L2 ~ L5 and aperture ST, and this aperture ST is between lens L4 and lens L5, and described lens L2 ~ L5 is formed with different focus mirror group respectively, and can move relative to this light-gathering optics group 222 with the motion track being different from other mirrors group respectively, and move with different tracks in the described lens L2 ~ L5 of the present embodiment according to different focus object distance, and the curve of the distance between itself and adjacent member can be found out by Fig. 4 A to Fig. 4 D, and object distance by 250 millimeters to 400 millimeters time, the detailed data of each lens L2 ~ L5 and adjacent member spacing D1 ~ D4 is as shown in the table:
| Object distance (mm) | 250 | 275 | 300 | 325 | 350 | 375 | 400 |
| Distance D1 (mm) | 14.482277 | 14.481682 | 14.506845 | 14.557766 | 14.634446 | 14.736884 | 14.865081 |
| Distance D2 (mm) | -0.005251 | 0.167873 | 0.3 | 0.39113 | 0.441262 | 0.450398 | 0.418536 |
| Distance D3 (mm) | 2.642403 | 2.569659 | 2.50671 | 2.453557 | 2.410198 | 2.376634 | 2.352866 |
| Distance D4 (mm) | 2.619951 | 2.388488 | 2.200091 | 2.05476 | 1.952495 | 1.893296 | 1.877163 |
The function of this light-gathering optics group 222 is image strip to be conducted to this projection optical system 24 according to the optical effect of institute's palpus.In addition, in the present embodiment, this light-gathering optics group 222 comprises four lens L6 ~ L9, and the top of the part lens L6 ~ L8 of this light-gathering optics group is cut and makes described lens L6 ~ L8 present asymmetric shape.Certainly, on reality is implemented, the number of lenses of this focusing optics group 221 and this light-gathering optics group 222 and lens shape, not as limit, also can carry out corresponding adjustment and change according to the demand of different optical design.
Continue and consult Fig. 1 and Fig. 2, this projection optical system 24 includes an a projection lens group G and catoptron R, this projection lens group G is between this catoptron R and this relay optical system 22, and include an a compound lens L10 and individual layer lens L11, and the compound lens L10 of this projection lens group G is one first optical surface S1 close to the minute surface of this relay optical system 22, and these individual layer lens L11 is one second optical surface S2 close to the minute surface of this catoptron R, and make this first optical surface S1 comparatively this second optical surface S2 close to this relay optical system 22.This catoptron R is concave mirror towards the minute surface of this projection lens group G and is non-spherical surface.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 projection lens group G.
Thus, refer to Fig. 3, and continuous consult Fig. 1 and Fig. 2, when this image light-source generation device 10 produces this image strip P, this image strip P enters this projection lens 20, and first cover lens L1 by this, after this focusing optics group 221 and this light-gathering optics group 222, this projection lens group G is injected from this first optical surface S1, this projection lens group G is left again by this second optical surface S2, and through this catoptron R after the mirror-reflection of this projection lens group G, this image strip P injects this projection lens group G once again from this second optical surface S2, this projection lens group G is left again by this first optical surface S1, and penetrate in this light-gathering optics group closest to after the eyeglass L9 of this projection optical system, penetrate from this projection lens 20 again and be projected to a cloth curtain 200 (i.e. imaging surface).
And should be noted that, catoptron R through this above-mentioned projection optical system reflects this image strip P and this projection lens group G is repeated to penetrate by this image strip P and reaches the optical design of secondary optics effect, can after contract lenses size and volume, also effectively can reach the design of high optical performance, and then effectively reach the effect of short Jiao and miniaturization.
In addition, the quantity of the optical element (i.e. lens L1 ~ L9 and aperture ST) of this relay optical system 22 of the present utility model is greater than the quantity of the optical element (i.e. lens L10 ~ L11 and catoptron R) of this projection optical system 24 as seen from Figure 2, and this design object be can for this image strip P through this relay optical system 22 time, good optical effect can be produced, and when short out-of-focus projection can be provided, still can have good projection imaging effect.
Moreover, when this image strip P is penetrated by this first optical surface S1 be not more than 1/2nd of the area of this first optical surface S1 by area.In addition, in last a slice lens (i.e. lens L9) that this image strip P jointly passes through before this projection lens 20 of injection, optical path after optical path before reflection and reflection is non-intersect, and then optical interference can be avoided to promote the quality of projection imaging.In addition, aforesaid lens L6 ~ L8 presents the reason of asymmetric shape, be that this image strip after by this catoptron R reflection can not penetrate above-mentioned described lens, the situation of optical interference just effectively can be avoided to occur, and then reach the effect promoting slimming and optical performance.
Should be noted that, the foregoing is only the better possible embodiments of the utility model, for example, implement in aspect at other, this occluding lens L1 also can present moveable design, make this projection lens 20 carry out optical focusing position can more close to reflection before optical path with reflection after optical path non-intersect, and then promote focusing and optical effect.In addition, such as apply the utility model instructions and the equivalence change for it of right institute, ought to be included in the scope of the claims of the present utility model.
Claims (12)
1. a projector, is characterized in that, comprising:
One image light-source generation device, in order to produce an image strip; And
One projection lens, in order to receive this image strip and to be projected to an imaging surface, and includes from the side close to this image light-source generation device extremely away from a relay optical system and a projection optical system of the side sequential of this image light-source generation device; This relay optical system includes a focusing optics group and a light-gathering optics group, and this focusing optics group and this light-gathering optics group include at least a slice lens respectively, and this focusing optics group comparatively this light-gathering optics group close to this image light-source generation device; In addition, this focusing optics group is between this light-gathering optics group and this image light-source generation device, and this light-gathering optics group moves back and forth relatively; This projection optical system includes a projection lens group and a catoptron, this projection lens group is between this catoptron and this relay optical system, and this projection lens group has one first optical surface and one second optical surface, and this first optical surface comparatively this second optical surface close to this light-gathering optics group; Wherein, this focusing optics group is multi-disc lens, and this focusing optics group also has an aperture, and this aperture is in this focusing optics group wherein between two panels eyeglass;
Thus, when this image light-source generation device produces this image strip, this image strip is sequentially by this focusing optics group and this light-gathering optics group, and inject this projection lens group from this first optical surface, leave this projection lens group by this second optical surface again, and through after the reflection of this catoptron, this image strip injects this projection lens group once again from this second optical surface, after leaving this projection lens group by this first optical surface again, be projected to this imaging surface.
2. projector as claimed in claim 1, it is characterized in that, at least a slice lens of this light-gathering optics group are multi-disc lens, and this image strip reflects through this catoptron, and after leaving this projection lens group by this first optical surface, also penetrate the lens of close this projection lens group of part in this light-gathering optics group, then be projected to this imaging surface.
3. projector as claimed in claim 1 or 2, is characterized in that, institute is by last a slice lens before being projected to this imaging surface for this image strip, and the optical path after the optical path before reflection and reflection is non-intersect.
4. projector as claimed in claim 2, it is characterized in that, the part lens in this light-gathering optics group is asymmetric shape.
5. projector as claimed in claim 1, it is characterized in that, the area passed through when this image strip is penetrated by this first optical surface, is not more than 1/2nd of the area of this first optical surface.
6. projector as claimed in claim 1, it is characterized in that, this projection lens also includes one and covers lens, and this covers lens between this focusing optics group and this image light-source generation device.
7. a projection lens, is characterized in that, in order to receive an image strip and to be projected to an imaging surface, and includes a relay optical system and a projection optical system, wherein:
This relay optical system includes a focusing optics group and a light-gathering optics group, and this focusing optics group and this light-gathering optics group include at least a slice lens respectively, and this focusing optics group moves relative to this light-gathering optics group; Wherein, this focusing optics group is multi-disc lens, and also has an aperture, and this aperture is in this focusing optics group wherein between two panels eyeglass;
This projection optical system includes a projection lens group and a catoptron, this projection lens group is between this catoptron and this light-gathering optics group, and this projection lens group has one first optical surface and one second optical surface, and this first optical surface comparatively this second optical surface close to this light-gathering optics group;
Thus, after this projection lens receives this image strip, this image strip is sequentially by this focusing optics group and this light-gathering optics group, and inject this projection lens group from this first optical surface, leave this projection lens group by this second optical surface again, and through after the reflection of this catoptron, this image strip injects this projection lens group once again from this second optical surface, after leaving this projection lens group by this first optical surface again, be projected to this imaging surface.
8. projection lens as claimed in claim 7, it is characterized in that, at least a slice lens of this focusing optics group are multi-disc lens, and are formed with many group focusing mirror groups, and described focusing mirror group moves relative to this light-gathering optics group with the motion track being different from other mirrors group respectively.
9. projection lens as claimed in claim 7, it is characterized in that, the part lens in this light-gathering optics group is asymmetric shape.
10. projection lens as claimed in claim 7, is characterized in that, also include one and cover lens, and this cover lens comparatively this focusing optics group away from this light-gathering optics group, and this focusing optics group is covered between lens and this light-gathering optics group at this.
11. projection lens as claimed in claim 7, is characterized in that, this catoptron is concave surface towards the minute surface of these at least a slice lens.
12. projection lens as claimed in claim 7, is characterized in that, this catoptron is non-spherical surface towards the minute surface of these at least a slice lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420439464.8U CN204302649U (en) | 2014-08-06 | 2014-08-06 | Projector and projection lens thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420439464.8U CN204302649U (en) | 2014-08-06 | 2014-08-06 | Projector and projection lens thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204302649U true CN204302649U (en) | 2015-04-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420439464.8U Expired - Fee Related CN204302649U (en) | 2014-08-06 | 2014-08-06 | Projector and projection lens thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204302649U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334684A (en) * | 2014-08-06 | 2016-02-17 | 林伊柔 | Projector and projection lens thereof |
| CN112180669A (en) * | 2019-07-03 | 2021-01-05 | 王志煌 | Projection device |
-
2014
- 2014-08-06 CN CN201420439464.8U patent/CN204302649U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334684A (en) * | 2014-08-06 | 2016-02-17 | 林伊柔 | Projector and projection lens thereof |
| CN105334684B (en) * | 2014-08-06 | 2017-06-27 | 林伊柔 | 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: 20150429 Termination date: 20170806 |