CN2795884Y - Micro display eyepiece optic imaging device - Google Patents
Micro display eyepiece optic imaging device Download PDFInfo
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- CN2795884Y CN2795884Y CN 200320121727 CN200320121727U CN2795884Y CN 2795884 Y CN2795884 Y CN 2795884Y CN 200320121727 CN200320121727 CN 200320121727 CN 200320121727 U CN200320121727 U CN 200320121727U CN 2795884 Y CN2795884 Y CN 2795884Y
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Abstract
The utility model relates to a micro display eyepiece optic imaging device. A lens a comprises a non spherical surface 1 and a first diffracting surface 2; a lens b comprises a second diffracting surface 3, a spherical surface 4, a liquid crystal display 5 and a casing body 6. The lens a and the lens b use flat surface bodies or spherical surface bodies or non spherical surface bodies, and the first diffracting surface and the second diffracting surface can use harmonic diffracting surfaces. The utility model is used for a lens of 60 DEG, which has micro display helmet and simple structure and can be directly matched with a liquid crystal display of which the diagonal is 1.1 inches. The property of aberration is good, the requirement of SXGA distinguishability can be satisfied, the exit pupil diameter is 10 mm, the exit pupil distance is 30 mm, the effective focal length is 39 mm, the diameter of the lens is nearly 32 mm and the weight is only 16 g. The utility model can realize micro display without a relay system, can be consequently better used for a modern helmet display, and has more compact structure and lighter weight, which illustrates that the optic imaging device of the utility model has more obvious advantage on helmet display.
Description
Technical field: the utility model belongs to optical imaging system, relates to the improvement of the little display eyepiece optical imaging system of a kind of birefringence helmet structure.
Background technology: the helmet is presented at and requires to have bigger emergent pupil and distance of exit pupil generally speaking, and simultaneously in order to alleviate user's fatigue, system should have as far as possible little volume and weight.Show for the binocular helmet, also should consider another one people factor, i.e. the binocular spacing.Adult binocular spacing is considered the assembling framework of camera lens generally in the scope of 50-74mm, and the aperture of lens should be less than 46mm, and is suitable with user's binocular spacing with the pupil spacing of guaranteeing helmet-mounted display system.In traditional eyepiece design, usually use two gummeds or three balsaming lenss to come the correcting chromatic aberration and the curvature of field etc., Fig. 1 in the background technology is exactly convex lens and the lens combination that cemented doublet is formed that has aspheric deep camber by, thereby make total system complex structure, heaviness, bigger diameter of lens can not be used for the binocular helmet and show, as shown in Figure 1 be exactly a traditional goggle structure.
Summary of the invention: for eyepiece optical system complex structure in the helmet micro display system that solves the Fig. 1 in the background technology, heaviness, the problem of bigger diameter of lens.The purpose of this utility model is to introduce diffraction surfaces in the system of background technology, increases design variable and degree of freedom, not only can improve the performance of system, and simplied system structure effectively, and a kind of optical imaging device of miniature display eyepiece is provided.
Technical solutions of the utility model comprise: adopt as shown in Figure 2: comprise two lens, lens a comprises aspheric surface, first diffraction surfaces; Lens b comprises second diffraction surfaces, sphere face shape, LCD and housing; Lens a is vertical with systematic optical axis with lens b or be certain angle with systematic optical axis; Preparation has first diffraction surfaces and second diffraction surfaces on the workplace of lens a and lens b, and wherein aspheric surface, first diffraction surfaces and the second diffraction surfaces three's position can exchange.First diffraction surfaces and second diffraction surfaces also can adopt harmonic diffraction surfaces.Sphere face shape is adopted plane body or spherical surface body or aspheric surface body.
In the utility model optical imaging device of miniature display eyepiece, image from LCD is seen 60 virtual degree view field image at last through the aberration correction of lens b and lens a in eyes, this moment, first diffraction lens and second diffraction lens played the effect of diffraction imaging here, sphere face type plays the effect of proofreading and correct primary aberration, aspheric surface plays the effect of proofreading and correct senior aberration, and diffraction surfaces plays the effect of correcting chromatic aberration and distortion.
Advantage of the present utility model: its visual field is 40 ° in background technology, is made of a positive lens and a cemented doublet.In order to obtain enough big emergent pupil, by the effective focal length panntographic system, the result is that focal length is 50mm, and emergent pupil is 10mm, and image planes are of a size of 35.4mm.The utility model is compared with background technology, design one and be used for the simple 60 ° of eyepieces of the little display structure of the helmet, this eyepiece is made up of two lens, contains two diffraction surfaces and an aspheric surface and a sphere, can be directly be that 1.1 inches LCD is complementary with the diagonal angle.Aberration characteristic is good, can satisfy the requirement of SXGA resolution, has the exit pupil diameter of 10mm and the distance of exit pupil of 30mm, and effective focal length is 39mm, and diameter of lens is about 32mm, and weight only is 16g, does not need relay system can realize little demonstration.Therefore can better be used for modern Helmet Mounted Display, structure is compact more, and weight is littler, illustrates that little display eyepiece optical imaging device of the present utility model has more significant advantage in the helmet shows.
Description of drawings:
Fig. 1 is the eyepiece system structural drawing in the utility model background technology
Fig. 2 is the structural representation of a kind of embodiment of the utility model
Subordinate list 1 be aberration characteristic curve of the present utility model wherein:
Subordinate list 1a is the axial aberration that hangs down, the subordinate list 1b curvature of field and distortion, and subordinate list 1c is a chromatic longitudiinal aberration.
Embodiment: following embodiment of the present utility model is described further:
The utility model Fig. 2 comprises: two lens, lens a comprise aspheric surface 1, first diffraction surfaces 2; Lens b comprises second diffraction surfaces 3, sphere face shape 4, LCD 5 and housing 6.Lens a and lens b can be vertical with systematic optical axis or be certain angle with systematic optical axis, and lens a and lens b and systematic optical axis angle can be chosen in 85 degree-95 degree, for example select 85 degree, 88 degree, 90 degree, 92 degree, 95 degree etc.Lens a and lens b adopt glass material can select TF6, TF5, TF4, TF3, TF1, TIF3, TIF2, TIF1, ZLAF4, ZLAF3, ZLAF2, ZLAF1, LAF10, LAF9, LAF8, LAF7, LAF6, LAF5, LAF4, LAF3, LAF2, LAF1, K5, K6, K7, K8, K9, K10 any one or two kinds of materials are wherein made.First diffraction surfaces 2 for preparing on the workplace of lens a and lens b and second diffraction surfaces 3 in an embodiment, can adopt in aspheric surface 1 and be made in lens a front surface, prepare first diffraction surfaces 2 in the rear surface of lens a, front surface at lens b prepares second diffraction surfaces 3, prepare sphere face shape 4 in the rear surface of lens b, lens a and lens b diffraction surfaces also adopt harmonic diffraction surfaces.LCD 5 adopts the LCD LCD; Housing 6 adopts materials such as metal and silit.
Subordinate list 1 (a), subordinate list 1 (b), subordinate list 1 (c) have provided its aberration characteristic curve respectively.All very little in visual field, center and 0.7 visual field from the vertical as can be known axial aberration of subordinate list 1 (a), all less than 100 μ m, the maximal value of visual field, edge is 283 μ m.According to subordinate list 1 (b) as can be known maximum distortion be 5%, this eyepiece for 60 ° of visual fields allows; The maximum curvature of field is 0.8mm, and burnt diopter is represented then corresponding 0.5D if personnel selection is had hallucinations.Can find out that from subordinate list 1 (c) chromatic longitudiinal aberration is less than 0.02mm.This shows that this rolls over/spread out the eyepice aberration characteristic and meet the demands.
Subordinate list 1 has provided this and has rolled over/spread out the modulation transfer function (MTF) curve of eyepiece 0 ° and 14 ° visual field.The same with other eyepiece, this eyepiece is poor at the modulation transfer function of big visual field, but is extraordinary in the visual field, center.Degree of modulation is 56cycles/mm greater than 0.3 o'clock pairing maximum spatial frequency, and this value is corresponding to the resolution of 112pixels/mm or 0.8 '.Therefore this rolls over/spreads out the helmet demonstration that the mixing eyepiece can be used for having SXGA resolution.
Subordinate list 1
Claims (3)
1, optical imaging device of miniature display eyepiece comprises LCD (5) and housing (6), it is characterized in that also comprising: two lens, lens a comprise aspheric surface (1), first diffraction surfaces (2); Lens b comprises second diffraction surfaces (3), sphere face shape (4); Lens a is vertical with systematic optical axis with lens b or be certain angle with systematic optical axis; Preparation has first diffraction surfaces (2) and second diffraction surfaces (3) on the workplace of lens a and lens b, and wherein aspheric surface (1), first diffraction surfaces (2) and second diffraction surfaces (3) three's position can exchange.
2, optical imaging device of miniature display eyepiece according to claim 1 is characterized in that: sphere face shape (4) is adopted plane body or spherical surface body or aspheric surface body.
3, optical imaging device of miniature display eyepiece according to claim 1 is characterized in that: first diffraction surfaces (2) and second diffraction surfaces (3) also can adopt harmonic diffraction surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320121727 CN2795884Y (en) | 2003-11-21 | 2003-11-21 | Micro display eyepiece optic imaging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320121727 CN2795884Y (en) | 2003-11-21 | 2003-11-21 | Micro display eyepiece optic imaging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2795884Y true CN2795884Y (en) | 2006-07-12 |
Family
ID=36813639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320121727 Expired - Fee Related CN2795884Y (en) | 2003-11-21 | 2003-11-21 | Micro display eyepiece optic imaging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2795884Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503076A (en) * | 2014-11-28 | 2015-04-08 | 青岛歌尔声学科技有限公司 | Micro display eyepiece and head-mounted equipment |
| WO2018094851A1 (en) * | 2016-11-28 | 2018-05-31 | 歌尔科技有限公司 | Camera lens having 2p structure, head-mounted display optical system, and head-mounted apparatus |
-
2003
- 2003-11-21 CN CN 200320121727 patent/CN2795884Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503076A (en) * | 2014-11-28 | 2015-04-08 | 青岛歌尔声学科技有限公司 | Micro display eyepiece and head-mounted equipment |
| CN106338821A (en) * | 2014-11-28 | 2017-01-18 | 歌尔科技有限公司 | Micro display eyepiece and head-mounted equipment |
| CN106338821B (en) * | 2014-11-28 | 2018-10-26 | 歌尔科技有限公司 | A kind of micro display eyepiece and helmet |
| WO2018094851A1 (en) * | 2016-11-28 | 2018-05-31 | 歌尔科技有限公司 | Camera lens having 2p structure, head-mounted display optical system, and head-mounted apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |