CN205787563U - Ultrashort out-of-focus projection device based on quadratic surface reflection - Google Patents
Ultrashort out-of-focus projection device based on quadratic surface reflection Download PDFInfo
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- CN205787563U CN205787563U CN201620506207.0U CN201620506207U CN205787563U CN 205787563 U CN205787563 U CN 205787563U CN 201620506207 U CN201620506207 U CN 201620506207U CN 205787563 U CN205787563 U CN 205787563U
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- reflection
- reflector element
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- projection device
- focus projection
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Abstract
The utility model discloses a kind of ultrashort out-of-focus projection device based on quadratic surface reflection, including optical lighting system, display system, lens assembly and reflection subassembly；Reflection subassembly is made up of first surface reflector element and the second camber reflection unit, light path is light path between lens assembly and first surface reflector element 2 3.5 times between first surface reflector element and the second camber reflection unit.This device can be effectively reduced distortion that image shows, make up aberration.
Description
Technical field
This utility model relates to closely projection field, ultrashort in particular to a kind of curved face reflecting type
Out-of-focus projection's device.
Background technology
Nearly ten years, Chinese architectural trade development is swift and violent, but room rate persistently rises, and not only life is omited at home
Aobvious compact, and each company is in order to increase income and decrease expenditure, the most commonly used small conference room.Narrow
Space in use short burnt or ultrashort focus projector is more applicable.Along with the prosperity of educational business among the people, ultrashort
Focus projector is the most ready to appear, and especially in children education industry, ultrashort focus projector coordinates blank to use,
Almost become standard configuration.
But short focus projector also has its inherent defect.Owing to scialyscope has projection distance, refer in particular to light source and curtain
There is very important distance in the picture on cloth, and the light source of scialyscope is diversity, has up and down
Certain angle, also there is certain angle left and right, and distortion easily occurs in the picture edge of projection.Projection distance is more
Closely, picture distortion manifests the most obvious.A kind of mode realizing short out-of-focus projection at present is to use reflective optic
Technology, i.e. projector lens by image projecting on the mirror, then are projected on projection screen by reflecting mirror.
Owing to projection picture gets to screen through reflection, image is easy to because any of reflecting mirror is the most small
Error and on projection screen, cause the deformation of image, the design to optical module of the most reflective short out-of-focus projection
Requirement with processing technique is of a relatively high.
In view of this, special proposition this utility model.
Utility model content
For problem above, this utility model provides a kind of ultrashort out-of-focus projection based on quadratic surface reflection dress
Putting, this device can be effectively reduced distortion that image shows, make up aberration.
A kind of ultrashort out-of-focus projection device based on quadratic surface reflection, including optical lighting system, display system
System, lens assembly and reflection subassembly；Reflection subassembly is by first surface reflector element and the second camber reflection list
Unit's composition, the light path between first surface reflector element and the second camber reflection unit is lens assembly and the
Between one camber reflection unit 2-3.5 times of light path.
Preferably, first surface reflector element and the second camber reflection unit use free-form surface mirror.
Preferably, in first surface reflector element, the curved surface opening of free-form surface mirror is 4cm-6cm,
The concave surface degree of depth is 3mm-5mm, and curved surface angle of inclination is 15 °-20 °.
Preferably, in the second camber reflection unit, the curved surface opening of free-form surface mirror is 5cm-7cm,
The concave surface degree of depth is 7mm-10mm, and curved surface angle of inclination is 20 °-25 °.
A kind of based on quadratic surface reflection the ultrashort out-of-focus projection device that this utility model provides, by using
On the forward direction light propagation path that twice camber reflection unit is organized before being arranged on camera lens, outgoing after camera lens, will be organized
Light reflect away, thus realize the purpose of ultrashort out-of-focus projection, amplify and show image projection, make up
Aberration, reduces pattern distortion, adds the angle of visual field.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Wherein, 1-optical lighting system, 2-lens assembly, 3-first surface reflector element, 4-the second song
Face reflector element.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that this utility model scheme, below in conjunction with the accompanying drawings and
The utility model is described in further detail for detailed description of the invention.
Refer to Fig. 1, a kind of ultrashort out-of-focus projection based on quadratic surface reflection provided by the utility model
Device, including optical lighting system, display system, lens assembly and reflection subassembly；Reflection subassembly is by
One camber reflection unit and the second camber reflection unit composition, first surface reflector element and the second curved surface are anti-
Penetrating the light path between unit is between lens assembly and first surface reflector element 2-3.5 times of light path, excellent
Elect 2.1 times as.
First surface reflector element and the second camber reflection unit all use free-form surface mirror.First is bent
In the reflector element of face, the curved surface opening of free-form surface mirror is 4cm-6cm, and the concave surface degree of depth is 3mm-5mm,
Curved surface angle of inclination is 15 °-20 °, and preferably curved surface opening is 5cm, and the concave surface degree of depth is 4mm, curved surface
Angle of inclination is 18 °.First surface reflector element mainly eliminates pincushion distortion.
In second camber reflection unit, the curved surface opening of free-form surface mirror is 5cm-7cm, the concave surface degree of depth
For 7mm-10mm, curved surface angle of inclination is 20 °-25 °.Preferably curved surface opening is 6cm, the concave surface degree of depth
For 8mm, curved surface angle of inclination is 22 °.Second camber reflection unit mainly eliminates barrel distortion.
After being reflected by above-mentioned quadratic surface, it is possible to be effectively increased light path, it is achieved ultrashort out-of-focus projection.Reflection
Its smooth surface of assembly has matter, can reduce light loss and picture distortion, and the brightness of image making reflection is high and constant
Shape, thus it is greatly improved the picture element of imaging system.
Above a kind of ultrashort out-of-focus projection device based on quadratic surface reflection provided by the utility model is entered
Go and be discussed in detail.Principle of the present utility model and embodiment are carried out by specific case used herein
Illustrating, the explanation of above example is only intended to help to understand core concept of the present utility model.Should
Point out, for those skilled in the art, before without departing from this utility model principle
Putting, it is also possible to this utility model is carried out some improvement and modification, these improve and modification also falls into this
In the protection domain that utility model right requires.
Claims (4)
1. a ultrashort out-of-focus projection device based on quadratic surface reflection, it is characterised in that include that optics shines
Bright system, display system, lens assembly and reflection subassembly；Reflection subassembly is by first surface reflector element and
Two camber reflection unit compositions, the light path between first surface reflector element and the second camber reflection unit is mirror
2-3.5 times of light path between head assembly and first surface reflector element.
A kind of ultrashort out-of-focus projection device based on quadratic surface reflection the most according to claim 1, its
Being characterised by, first surface reflector element and the second camber reflection unit use free-form surface mirror.
A kind of ultrashort out-of-focus projection device based on quadratic surface reflection the most according to claim 2, its
Being characterised by, in first surface reflector element, the curved surface opening of free-form surface mirror is 4cm-6cm, concave surface
The degree of depth is 3mm-5mm, and curved surface angle of inclination is 15 °-20 °.
A kind of ultrashort out-of-focus projection device based on quadratic surface reflection the most according to claim 2, its
Being characterised by, in the second camber reflection unit, the curved surface opening of free-form surface mirror is 5cm-7cm, concave surface
The degree of depth is 7mm-10mm, and curved surface angle of inclination is 20 °-25 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620506207.0U CN205787563U (en) | 2016-05-27 | 2016-05-27 | Ultrashort out-of-focus projection device based on quadratic surface reflection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620506207.0U CN205787563U (en) | 2016-05-27 | 2016-05-27 | Ultrashort out-of-focus projection device based on quadratic surface reflection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205787563U true CN205787563U (en) | 2016-12-07 |
Family
ID=59979575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620506207.0U Expired - Fee Related CN205787563U (en) | 2016-05-27 | 2016-05-27 | Ultrashort out-of-focus projection device based on quadratic surface reflection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205787563U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707478A (en) * | 2017-01-12 | 2017-05-24 | 北京航宇荣康科技股份有限公司 | Off-axis virtual image display system of free-form surface projection screen |
-
2016
- 2016-05-27 CN CN201620506207.0U patent/CN205787563U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707478A (en) * | 2017-01-12 | 2017-05-24 | 北京航宇荣康科技股份有限公司 | Off-axis virtual image display system of free-form surface projection screen |
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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 |
Granted publication date: 20161207 Termination date: 20210527 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |