CN205157872U - Refraction meridianal image surface and separation of refraction sagitta of arc image planes ultrashort apart from projecting lens - Google Patents
Refraction meridianal image surface and separation of refraction sagitta of arc image planes ultrashort apart from projecting lens Download PDFInfo
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- CN205157872U CN205157872U CN201520879500.7U CN201520879500U CN205157872U CN 205157872 U CN205157872 U CN 205157872U CN 201520879500 U CN201520879500 U CN 201520879500U CN 205157872 U CN205157872 U CN 205157872U
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Abstract
The utility model relates to a refraction meridianal image surface and separation of refraction sagitta of arc image planes ultrashort apart from projecting lens. Its characterized in that includes display chip, refraction camera lens group and rotational symmetry speculum, display chip through refraction camera lens group back in the middle of formation of image between refraction camera lens group and the rotational symmetry speculum is for the meridian of separation like with the sagitta of arc in the middle of like, in the middle of the meridian of separation like with the sagitta of arc in the middle of like the astigmatism that disappears on the screen through rotational symmetry speculum formation of image back, form the image of clarity. The utility model discloses simple structure has 0.27 -0.31 and throws and compare, 170 times of - 220 times of magnifying powers, and minimum distortion has the optical structure, the fine definition that offset the astigmatism, and the tolerance is very good, requires lowerly to the optical element installation accuracy, has very high volume production yields.
Description
Technical field
The utility model relates to a kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface.
Background technology
At present, conventional projection lens has that focal length is large, visual field is little usually, project than the deficiency such as large.But along with the development of projector, large scale Projection Display is more and more subject to the favor of consumer, common projection lens can not meet the requirement that little space projects large scale picture well, becomes one of major reason of restriction projector fast development.Although there is now the projection of indivedual projector ratio to be less than 1, usually because contrast, sharpness are poor, the reasons such as aberration, distortion are larger are not well positioned to meet the demand in market yet.Along with the development of shadow casting technique, the projection of short distance projection lens can be less than 0.3 than, effectively meets the requirement that little space projects large scale picture.
Existing short distance projection lens complex structure, general application multi-disc non-spherical lens is with aberration correction, but multi-disc non-spherical lens can cause short distance projection lens complex structure, and tolerance is bad, and installation accuracy requires high.Some short distance projection lens adopt free-form surface mirror effectively correct distortion and eliminate astigmatism simultaneously.Although free-form surface mirror has good distortion correction function relative to Rotational Symmetry catoptron and astigmatism eliminates function, but free-form surface mirror difficulty of processing is large, be difficult to accurate detection, cause the face shape being difficult to effectively control free-form surface mirror in volume production.Free-form surface mirror is very strict to the requirement of tolerance simultaneously, and installation accuracy requires high, and cause final short distance projection lens product volume production yield low, actual imaging effect is not ideal enough.In addition, some short distance projection lens adopt Rotational Symmetry catoptron, although it is simple to have structure, be easy to the advantage detecting and process, but because Rotational Symmetry catoptron has different curvature distribution at meridian direction and sagitta of arc direction, therefore can cause larger astigmatism, thus the meridian intermediary image overlapped and sagitta of arc intermediary image cannot be formed on screen after Rotational Symmetry mirror imager simultaneously clearly as, thus cause declining to a great extent of image sharpness.
Utility model content
For problems of the prior art, the purpose of this utility model is to provide a kind of technical scheme reflecting the short distance projection lens that meridianal image surface is separated with refraction sagittal image surface.
Described a kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface, it is characterized in that comprising display chip, refracting telescope head group and Rotational Symmetry catoptron, display chip is imaged as the meridian intermediary image and sagitta of arc intermediary image that are separated after refracting telescope head group between refracting telescope head group with Rotational Symmetry catoptron, the meridian intermediary image be separated and sagitta of arc intermediary image disappear astigmatism after Rotational Symmetry mirror imager on screen, form image clearly.
Described a kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface, it is characterized in that organizing and group after refractive lens focusing before described refracting telescope head group comprises refractive lens focusing, before refractive lens focusing, group comprises the display chip cover glass set gradually from left to right, TIR prism and the first glass lens, after refractive lens focusing, group comprises the second glass lens set gradually from left to right, 3rd glass lens, 4th pair of glyglass lens, aperture diaphragm, 5th glass lens, 6th glass lens, 7th glass lens, 8th glass lens, 9th glass lens and the tenth plastic lens.
Described a kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface, the spacing that it is characterized in that described display chip cover glass and TIR prism is 1.25mm, the spacing of TIR prism and the first glass lens is 8.6mm-8.2mm, the spacing of the first glass lens and the second glass lens is 2.4mm-1.1mm, the spacing of the second glass lens and the 3rd glass lens is 0.7mm, the spacing of the 3rd glass lens and the 4th pair of glyglass lens is 3.67mm, the spacing of the 4th pair of glyglass lens and aperture diaphragm is 13.7mm, the spacing of aperture diaphragm and the 5th glass lens is 0, the spacing of the 5th glass lens and the 6th glass lens is 15.25mm, the spacing of the 6th glass lens and the 7th glass lens is 0.7mm, the spacing of the 7th glass lens and the 8th glass lens is 3.38mm, the spacing of the 8th glass lens and the 9th glass lens is 5.46mm, the spacing of the 9th glass lens and the tenth plastic lens is 6.67mm.
Described a kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface, it is characterized in that the thickness of described first glass lens is 5.2mm, the radius-of-curvature of its left surface and right flank is respectively 108.83mm and 29.1mm; The thickness of the second glass lens is 6.11mm, and the radius-of-curvature of its left surface and right flank is respectively 39.2mm and 76.9mm; The thickness of the 3rd glass lens is 1.5mm, and the radius-of-curvature of its left surface and right flank is respectively 67.73mm and 26.58mm; The thickness of the 4th pair of glyglass lens is 7.36mm, and the radius-of-curvature of its left surface and right flank is respectively infinitely great and 34.4mm; The thickness of the 5th glass lens is 2.8mm, and the radius-of-curvature of its left surface and right flank is respectively infinitely great and 50mm; The thickness of the 6th glass lens is 4.2mm, and the radius-of-curvature of its left surface and right flank is respectively infinitely great and 37.44mm; The thickness of the 7th glass lens is 6mm, and the radius-of-curvature of its left surface and right flank is respectively 23.84mm and 53.74mm; The thickness of the 8th glass lens is 6mm, and the radius-of-curvature of its left surface and right flank is respectively infinitely great and 25.02mm; The thickness of the 9th glass lens is 1.5mm, and the radius-of-curvature of its left surface and right flank is respectively 23.7mm and infinity; The thickness of the tenth plastic lens is 6mm, and the radius-of-curvature of its left surface and right flank is respectively 16.75mm and 20.96mm.
Described a kind of short distance projection lens reflecting meridianal image surface and is separated with refraction sagittal image surface, it is characterized in that described tenth plastic lens from left to right two surperficial expression formulas be set to the secondary aspheric surface expression formula in Europe, its expression formula form is:
Wherein:
face type height,
fit sphere curvature,
the projection of surface points coordinate in vertical optical axis plane and the distance of optical axis,
be
coefficient, n is positive integer.
Described a kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface, is characterized in that the coefficient of described tenth plastic lens left-hand face is as follows:
,
,
,
,
,
;
The coefficient of the tenth plastic lens right lateral surface is as follows:
,
,
,
,
,
.
Described a kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface, it is characterized in that the expression formula of described Rotational Symmetry catoptron is set to odd aspheric surface expression formula, its expression formula form is:
Wherein:
face type height,
fit sphere curvature,
the projection of surface points coordinate in vertical optical axis plane and the distance of optical axis,
be
coefficient, n is positive integer.
Described a kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface, is characterized in that the separation degree of described meridian intermediary image and sagitta of arc intermediary image is distributed by the first order derivative of Rotational Symmetry catoptron
distribute with second derivative
determine.
The utility model structure is simple, has 0.27-0.31 and projects ratio, 170 times of-220 x magnification, minimum distortion, have to anastigmatic optical texture, high definition, tolerance is very good, require lower to optical element installation accuracy, there is very high volume production yields.
Accompanying drawing explanation
Fig. 1 is the utility model short distance projection lens final products schematic diagram;
Fig. 2 is display chip intermediary image schematic diagram;
Fig. 3 is the utility model optical texture schematic diagram;
In figure: 10-display chip, 20-refracting telescope head group, 30-Rotational Symmetry catoptron, the intermediary image of 40-display chip, 50-screen, group before the focusing of 21-refractive lens, group after the focusing of 22-refractive lens, 211-display chip cover glass, 212-TIR prism, 213-first glass lens, 221-second glass lens, 222-the 3rd glass lens, 223-the 4th pair of glyglass lens, 224-aperture diaphragm, 225-the 5th glass lens, 226-the 6th glass lens, 227-the 7th glass lens, 228-the 8th glass lens, 229-the 9th glass lens, 230-the tenth plastic lens, 41-meridian intermediary image, 42-sagitta of arc intermediary image.
Embodiment
Below in conjunction with Figure of description, the utility model is described in further detail:
A kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface, comprise display chip 10, refracting telescope head group 20 and Rotational Symmetry catoptron 30, display chip 10 intermediary image 40 for meridian intermediary image 41 and sagitta of arc intermediary image 42(display chip that imaging is separated between refracting telescope head group 20 with Rotational Symmetry catoptron 30 after refracting telescope head group 20), the meridian intermediary image be separated and sagitta of arc intermediary image disappear on screen 50 astigmatism (counteracting) after Rotational Symmetry mirror imager, form image clearly.
Because Rotational Symmetry catoptron has different curvature distribution at meridian direction and sagitta of arc direction, therefore larger astigmatism can be caused, so the meridian intermediary image overlapped and sagitta of arc intermediary image cannot be formed on screen after Rotational Symmetry mirror imager simultaneously clearly as, thus cause declining to a great extent of image sharpness.And the meridian intermediary image be separated and sagitta of arc intermediary image are by after Rotational Symmetry mirror imager, meridian intermediary image is offset by Rotational Symmetry catoptron with being separated of sagitta of arc intermediary image, can be formed on screen simultaneously clearly as, thus overlap on screen and form image clearly.The utility model is by being equipped with refracting telescope head group, and display chip is refracted meridian intermediary image and the sagitta of arc intermediary image that lens group is imaged as separation, the meridian intermediary image of this separation and sagitta of arc intermediary image again by Rotational Symmetry mirror imager on screen.
As shown in Figure 2, refracting telescope head group 20 organizes 21 and the rear group 22 of refractive lens focusing before comprising refractive lens focusing.
As shown in Figure 3, before refractive lens focusing, group 21 comprises display chip cover glass 211, TIR prism 212, first glass lens 213 set gradually from left to right.After refractive lens focusing, group 22 comprises the second glass lens 221 set gradually from left to right, 3rd glass lens 222,4th pair of glyglass lens 223, aperture diaphragm 224, the 5th glass lens the 225, six glass lens 226,7th glass lens 227,8th glass lens the 228, nine glass lens the 229, ten plastic lens 230.
Display chip cover glass 211 is 1.25mm with the spacing of TIR prism 212; The spacing range of TIR prism and the first glass lens 213 is 8.6mm-8.2mm; The spacing range of the first glass lens 213 and the second glass lens 221 is 2.4mm-1.1mm; The spacing of the second glass lens 221 and the 3rd glass lens 222 is 0.7mm; The spacing of the 3rd glass lens 222 and the 4th pair of glyglass lens 223 is 3.67mm; 4th pair of glyglass lens 223 are 13.7mm with the spacing of aperture diaphragm 224; The spacing of aperture diaphragm 224 and the 5th glass lens 225 is 0; The spacing of the 5th glass lens 225 and the 6th glass lens 226 is 15.25mm; The spacing of the 6th glass lens 226 and the 7th glass lens 227 is 0.7mm; The spacing of the 7th glass lens 227 and the 8th glass lens 228 is 3.38mm; The spacing of the 8th glass lens 228 and the 9th glass lens 229 is 5.46mm; The spacing of the 9th glass lens 229 and the tenth plastic lens 230 is 6.67mm.
The thickness of the first glass lens 213 is 5.2mm, and the radius-of-curvature of its left surface and right flank is respectively 108.83mm and 29.1mm; The thickness of the second glass lens 221 is 6.11mm, and the radius-of-curvature of its left surface and right flank is respectively 39.2mm and 76.9mm; The thickness of the 3rd glass lens 222 is 1.5mm, and the radius-of-curvature of its left surface and right flank is respectively 67.73mm and 26.58mm; The thickness of the 4th pair of glyglass lens 223 is 7.36mm, and the radius-of-curvature of its left surface and right flank is respectively infinitely great and 34.4mm; The thickness of the 5th glass lens 225 is 2.8mm, and the radius-of-curvature of its left surface and right flank is respectively infinitely great and 50mm; The thickness of the 6th glass lens 226 is 4.2mm, and the radius-of-curvature of its left surface and right flank is respectively infinitely great and 37.44mm; The thickness of the 7th glass lens 227 is 6mm, and the radius-of-curvature of its left surface and right flank is respectively 23.84mm and 53.74mm; The thickness of the 8th glass lens 228 is 6mm, and the radius-of-curvature of its left surface and right flank is respectively infinitely great and 25.02mm; The thickness of the 9th glass lens 229 is 1.5mm, and the radius-of-curvature of its left surface and right flank is respectively 23.7mm and infinity; The thickness of the tenth plastic lens 230 is 6mm, and the radius-of-curvature of its left surface and right flank is respectively 16.75mm and 20.96mm.
The utility model the tenth plastic lens 230 from left to right two surperficial expression formulas is set to Europe time aspheric surface expression formula, and its expression formula form is:
Wherein:
face type height,
fit sphere curvature,
the projection of surface points coordinate in vertical optical axis plane and the distance of optical axis,
be
coefficient, n is positive integer.
The coefficient of the tenth plastic lens 230 left-hand face is as follows:
,
,
,
,
,
;
The coefficient of the tenth plastic lens right lateral surface is as follows:
,
,
,
,
,
.
By regulating refracting telescope head group, the zoom from 170 times to 220 times can be realized, realize the projection ratio from 0.27 to 0.31.
Display chip is refracted meridian intermediary image 41 and the sagitta of arc intermediary image 42 that lens group is imaged as separation, when 0 visual field, and meridian intermediary image 41 and sagitta of arc intermediary image 42 overlap; When visual field increases, meridian intermediary image 41 and sagitta of arc intermediary image 42 separation degree increase gradually; In peripheral field (maximum field of view), meridian intermediary image 41 is separated with sagitta of arc intermediary image 42 and reaches maximal value.
The Rotational Symmetry catoptron 30 with rotational symmetry has better processibility, detectability and tolerance relative to free form surface Rotational Symmetry catoptron, but the Rotational Symmetry catoptron 30 with rotational symmetry has different curvature distribution for incident light at meridian direction and sagitta of arc direction, this can cause the meridian intermediary image 41 of display chip 10 and sagitta of arc intermediary image 42 cannot be overlapping after Rotational Symmetry catoptron 30 imaging, forms significant astigmatism thus cannot form image clearly on screen; And refracting telescope head group 20 of the present utility model has the effect be separated with sagitta of arc intermediary image 42 by the meridian intermediary image 41 of display chip 10, effectively can offset meridian intermediary image 41 and the astigmatism of sagitta of arc intermediary image 42 after Rotational Symmetry catoptron 30 imaging, and reduce distortion, thus on screen, form image clearly.
The expression formula that the utility model has the Rotational Symmetry catoptron 30 of rotational symmetry is set to odd aspheric surface expression formula, and its expression formula form is:
Wherein:
face type height,
fit sphere curvature,
the projection of surface points coordinate in vertical optical axis plane and the distance of optical axis,
be
coefficient, n is positive integer.
Display chip 10 is imaged as meridian intermediary image 41 and the sagitta of arc intermediary image 42 of separation through refractive lens group, and the separation degree of meridian intermediary image 41 and sagitta of arc intermediary image 42 is distributed by the first order derivative of Rotational Symmetry catoptron 30
distribute with second derivative
determine.
Compared to prior art, the utility model has extremely low projection ratio, high enlargement ratio, minimum distortion.Catadioptric convolution short distance projection lens of the present utility model has to anastigmatic optical texture thus has high sharpness simultaneously.Catadioptric convolution short distance projection lens structure of the present utility model is simple, only adopt a slice non-spherical lens, Rotational Symmetry catoptron that 10 sheet glass lens and one have rotational symmetry, be easy to processing, convenient detection, there is very good tolerance, require lower to optical element installation accuracy, final short distance projection lens product volume production yield is very high, and actual imaging effect is ideal.
Claims (8)
1. the short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface, it is characterized in that comprising display chip, refracting telescope head group and Rotational Symmetry catoptron, display chip is imaged as the meridian intermediary image and sagitta of arc intermediary image that are separated after refracting telescope head group between refracting telescope head group with Rotational Symmetry catoptron, the meridian intermediary image be separated and sagitta of arc intermediary image disappear astigmatism after Rotational Symmetry mirror imager on screen, form image clearly.
2. a kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface according to claim 1, it is characterized in that organizing and group after refractive lens focusing before described refracting telescope head group comprises refractive lens focusing, before refractive lens focusing, group comprises the display chip cover glass set gradually from left to right, TIR prism and the first glass lens, after refractive lens focusing, group comprises the second glass lens set gradually from left to right, 3rd glass lens, 4th pair of glyglass lens, aperture diaphragm, 5th glass lens, 6th glass lens, 7th glass lens, 8th glass lens, 9th glass lens and the tenth plastic lens.
3. a kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface according to claim 2, the spacing that it is characterized in that described display chip cover glass and TIR prism is 1.25mm, the spacing of TIR prism and the first glass lens is 8.6mm-8.2mm, the spacing of the first glass lens and the second glass lens is 2.4mm-1.1mm, the spacing of the second glass lens and the 3rd glass lens is 0.7mm, the spacing of the 3rd glass lens and the 4th pair of glyglass lens is 3.67mm, the spacing of the 4th pair of glyglass lens and aperture diaphragm is 13.7mm, the spacing of aperture diaphragm and the 5th glass lens is 0, the spacing of the 5th glass lens and the 6th glass lens is 15.25mm, the spacing of the 6th glass lens and the 7th glass lens is 0.7mm, the spacing of the 7th glass lens and the 8th glass lens is 3.38mm, the spacing of the 8th glass lens and the 9th glass lens is 5.46mm, the spacing of the 9th glass lens and the tenth plastic lens is 6.67mm.
4. a kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface according to claim 2, the thickness that it is characterized in that described first glass lens is 5.2mm, and the radius-of-curvature of its left surface and right flank is respectively 108.83mm and 29.1mm; The thickness of the second glass lens is 6.11mm, and the radius-of-curvature of its left surface and right flank is respectively 39.2mm and 76.9mm; The thickness of the 3rd glass lens is 1.5mm, and the radius-of-curvature of its left surface and right flank is respectively 67.73mm and 26.58mm; The thickness of the 4th pair of glyglass lens is 7.36mm, and the radius-of-curvature of its left surface and right flank is respectively infinitely great and 34.4mm; The thickness of the 5th glass lens is 2.8mm, and the radius-of-curvature of its left surface and right flank is respectively infinitely great and 50mm; The thickness of the 6th glass lens is 4.2mm, and the radius-of-curvature of its left surface and right flank is respectively infinitely great and 37.44mm; The thickness of the 7th glass lens is 6mm, and the radius-of-curvature of its left surface and right flank is respectively 23.84mm and 53.74mm; The thickness of the 8th glass lens is 6mm, and the radius-of-curvature of its left surface and right flank is respectively infinitely great and 25.02mm; The thickness of the 9th glass lens is 1.5mm, and the radius-of-curvature of its left surface and right flank is respectively 23.7mm and infinity; The thickness of the tenth plastic lens is 6mm, and the radius-of-curvature of its left surface and right flank is respectively 16.75mm and 20.96mm.
5. a kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface according to Claims 2 or 3 or 4, it is characterized in that described tenth plastic lens from left to right two surperficial expression formulas be set to Europe time aspheric surface expression formula, its expression formula form is:
Wherein:
face type height,
fit sphere curvature,
the projection of surface points coordinate in vertical optical axis plane and the distance of optical axis,
be
coefficient, n is positive integer.
6. a kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface according to claim 5, is characterized in that the coefficient of described tenth plastic lens left-hand face is as follows:
,
,
,
,
,
;
The coefficient of the tenth plastic lens right lateral surface is as follows:
,
,
,
,
,
.
7. a kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface according to Claims 2 or 3 or 4, it is characterized in that the expression formula of described Rotational Symmetry catoptron is set to odd aspheric surface expression formula, its expression formula form is:
Wherein:
face type height,
fit sphere curvature,
the projection of surface points coordinate in vertical optical axis plane and the distance of optical axis,
be
coefficient, n is positive integer.
8. a kind of short distance projection lens reflecting meridianal image surface and be separated with refraction sagittal image surface according to claim 7, is characterized in that the separation degree of described meridian intermediary image and sagitta of arc intermediary image is distributed by the first order derivative of Rotational Symmetry catoptron
distribute with second derivative
determine.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520879500.7U CN205157872U (en) | 2015-11-06 | 2015-11-06 | Refraction meridianal image surface and separation of refraction sagitta of arc image planes ultrashort apart from projecting lens |
| US15/344,545 US10606049B2 (en) | 2015-11-06 | 2016-11-06 | Ultra-short distance projection lens with refractive meridional image surface and refractive sagittal image surface being isolated |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520879500.7U CN205157872U (en) | 2015-11-06 | 2015-11-06 | Refraction meridianal image surface and separation of refraction sagitta of arc image planes ultrashort apart from projecting lens |
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| CN205157872U true CN205157872U (en) | 2016-04-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105204146A (en) * | 2015-11-06 | 2015-12-30 | 浙江水晶光电科技股份有限公司 | Ultra-short projection lens with separated refraction meridianal image surface and refraction sagittal image surface |
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2015
- 2015-11-06 CN CN201520879500.7U patent/CN205157872U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105204146A (en) * | 2015-11-06 | 2015-12-30 | 浙江水晶光电科技股份有限公司 | Ultra-short projection lens with separated refraction meridianal image surface and refraction sagittal image surface |
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