CN106855655A

CN106855655A - Asymmetric curved surface prism image display optical system

Info

Publication number: CN106855655A
Application number: CN201510898680.8A
Authority: CN
Inventors: 叶世博; 赖韦龙; 陈纪暐; 陈心怡
Original assignee: MIN AIK Tech CO Ltd
Current assignee: MIN AIK Tech CO Ltd
Priority date: 2015-12-08
Filing date: 2015-12-08
Publication date: 2017-06-16
Anticipated expiration: 2035-12-08
Also published as: CN106855655B

Abstract

The invention discloses a kind of asymmetric curved surface prism image display optical system, the main front and back in one first prism is respectively equipped with the second prism and prism, first prism is being provided with an exit plane near the side of eyes, just enter that optical plane is relative with a air gap with the second prism, this plane can be used as the benchmark of detection free form surface；Second prism is parallel to each other near the side plane that the exit plane of eyes is close on the outside of the visual field with prism so that extraneous image is relatively sharp；When imaging panel launches light into the first prism, being all-trans through exit plane is incident upon reflex arc face and is then passed through exit plane, by the air gap, and enters optical plane and exit plane into the second prism, then through eye pupil in retina image-forming.

Description

Asymmetric curved surface prism image display optical system

Technical field

The present invention relates to a kind of asymmetric curved surface prism image display optical system；Especially It is related to a kind of asymmetric curved surface prism image display optical system of wear-type, the device Image is projected into eye pupil using optical system, so that eyes can read image letter Cease and see external scene clearly simultaneously.

Background technology

Asymmetric curved surface prism image display optical system relatively advanced at present has developed To coordinating Optical devices to project into eye pupil image, can be seen with sharp eyes nature forward sight The image information of projection, this device is designed as hanging at the moment or is worn on the head mostly, with Beneficial to viewing, existing such device is broadly divided into two kinds of immersion and non-invasive, non- Immersion head-mounted display is current main flow, except being displayed for picture, also User can be allowed to see the extraneous image after display screen；This characteristic is often used for Augmented reality, at present augmented reality on the market be mainly designed in optical system Apply the design of more free form surface, the technology of this multiple free form surfaces just into One of technical way for this product, more advanced example is：United States Patent (USP) No. 5,701,202, No. 6,384,983 and the 2001/0009478th A1 patents are disclosed Case, although this kind of design technically obtained many improvement, but use and Still there is following major defect in manufacture：

Firstly, since multiple free form surfaces are provided with main optical mirror slip at present, If wanting to see the extraneous image after display screen, in the freely bent of the optical mirror slip Face rear will add compensation eyeglass, but because the first face of optical mirror slip is using bent Face or the design of free form surface, can cause that compensation lens design below cannot be mended completely Repay front all visual fields, cause through display screen rear extraneous image definition not It is good, cause and be unable to reach more perfect image.

In addition, the manufacture of free form surface, although there is the Ultraprecision Machining can be with present Realize, but be directed to the measurement checking and correction of ejecting product still have great difficulty, this A little difficulties mostly come from cannot have good positioning method to measure, due to nothing Method has benchmark of the datum level as measurement product parts tolerance, is also difficult to penetrating Product is maked corrections, therefore when this manufacturing process is accomplished by spending more inspection Between and human cost, it is necessary to experiment slowly is making the eyeglass that preferably makes corrections.

Therefore, how to develop a low cost, a positioning inspection can be made to major optical eyeglass The structure tested and make corrections, the definition except image can be improved, and benefit can be made Positive work is more accurate, saves the cost of manufacturing time and human and material resources, is industry Still need to the direction made great efforts.

The content of the invention

The main object of the present invention is for above-mentioned deficiency of the prior art, it is considered to this In Optical devices, that surface that will be close to the optical element of eyes is designed as plane, The side that will be close to extraneous image again is also configured as plane, and the two planes are parallel, Then eyes see that extraneous image, just as seeing outside through a glass window, does not interfere with people External image, can obtain clearly image soon, solve of the prior art One shortcoming.

Another object of the present invention is to solve the problems, such as measurement correction, therefore by optical system The reflecting surface of intermediary element is also configured as plane, so when the element of free form surface makes, Datum level can be just made of the plane to measure and make corrections, and so just solved existing There is second shortcoming in technology.

To achieve the above object, the present invention can be reached with following mode：

If one first prism, it is provided with one end into light concave arc, near the side of eyes An exit plane is provided with, one is provided with the outside of the close visual field of the first prism in freely bent The reflection cambered surface in face；One second prism is set again, and optical plane and exit plane are entered with one, Wherein this to enter optical plane relative with the exit plane of the first prism, and between leaving an air Gap, and the exit plane is relative with eyes；A prism separately is set, it is light Compensating plate, concave arc is carried with one, and this concave arc and the first prism are on the outside of the visual field The reflection cambered surface of free form surface relative can abut against (or bonding) in the reflex arc of the first prism Face, and being provided with a side plane on the outside of the visual field, the side plane and the second prism Exit plane is parallel；An imaging panel is more set, located at entering at light concave arc for the first prism； Image light on the imaging panel is put down through the light concave arc directive light extraction that enters of the first prism Face, is all-trans through exit plane and is incident upon reflex arc face, then is reflected and through exit plane, By the air gap, and enter optical plane, exit plane into the second prism, then Through eye pupil in retina image-forming.

Brief description of the drawings

Fig. 1 is primary structure constitutional diagram of the invention；

Fig. 2 is primary structure exploded view of the invention；

Fig. 3 is embodiments of the invention top view；

Fig. 4 a are one schematic diagram of action of the invention；

Fig. 4 b are two schematic diagrames of action of the invention；

Fig. 5 is structure change schematic diagram of the invention.

Description of reference numerals：The prisms of 10- first；11- enters light concave arc；12- exit planes； 13- reflects cambered surface；14- collecting ends；The prisms of 20- second；21- enters optical plane；22- goes out Optical plane；23- end faces；30- prisms；31- carries concave arc；32- side planes；33- End face；34- supports end；40- images panel；50- eye pupils；L1- light；S- gaps.

Specific embodiment

It is as shown in Figure 1 and Figure 2 presently preferred embodiments of the present invention, it is non-that the present invention is provided Symmetroid prism image display optical system is comprised at least to be had：

First prism 10, at one end (upper end or lower end) be provided with into light concave arc 11, should It can be a spherical arc, aspherical arc or free form surface to enter light concave arc 11, in the first prism 10 are provided with an exit plane 12 near the side of eyes, one end of the exit plane 12 with Enter that light concave arc 11 is adjacent, one is provided with the outside of the close visual field of the first prism 10 freely bent The reflection cambered surface 13 in face, and the one end of reflection cambered surface 13 is adjacent with light concave arc 11 is entered, separately Intersect with exit plane 12 and form the collecting end 14 of the first prism 10 in one end；The reflection Plated film is improving reflecting effect in cambered surface 13.

One second prism 20, is a prism wedge, and optical plane 21, light extraction is entered with one Plane 22 and end face 23, the wherein light extraction for entering the prism 10 of optical plane 21 and first are put down Face 12 is relative, and leaves a air gap S, and the purpose of gap S is to make light the Total reflection can be formed when in one prism 10 with wide-angle directive exit plane 12, is not Disturb the second prism 20；Exit plane 22 pairs is to eyes.

One prism 30, is the compensating plate of light, and concave arc 31, energy are carried with one The relative reflection cambered surface 13 for abutting in the first prism 10, and be provided with the outside of the visual field One side plane 32, the side plane 32 is parallel with the exit plane 22 of the second prism 20, mesh To make eyes see extraneous image just as seeing outside, Bu Huiying through glass window People's external image soon is rung, therefore image is relatively sharp；To make prism 30 and One prism 10, the second prism 20 pairing it is more complete, then be respectively equipped with end face 33 and Collocation more consolidation is set to fit to end 34.

When actually implementing, second prism 20 and prism 30 can with one into The mode of type is constituted, i.e., support the prism of end 34 and second with the lower section side of prism 30 The 20 lower section optics for entering optical plane 21 is combined as use, so as to be integrally formed Mode constitute, be just available for the second prism between second prism 20 and prism 30 20 insert, and are an alternative embodiment of the invention.

The carrying concave arc 31 of above-mentioned prism 30 abuts in the reflex arc of the first prism 10 On face 13, therebetween recline mode including but not limited to tight abutment, bonding or It is reserved with the modes such as a air gap.

The first prism 10, the second prism 20, prism 30 in as shown in Figure 1 is under Hold non-effective light to pass through part, can as shown in figure 5, trimmed in lower section, with Save space and material, also belong to the scope of the present invention.

As shown in Figure 1 and Figure 2, an imaging panel 40, light is entered located at the first prism 10 At concave arc 11；The imaging panel 40 can be the panel of self-emission panel or reflection source, Image can be injected in the first prism 10.

As shown in Fig. 2, Fig. 3, Fig. 4 a, if imaging panel 40 is with self-emission panel as real When applying, image light L1 the entering through the first prism 10 on the imaging panel 40 The directive exit plane 12 of light concave arc 11, can be all-trans through exit plane 12 and be incident upon the anti-of plated film Penetrate cambered surface 13, then reflected and through exit plane 12, by the air gap S, and Enter optical plane 21, exit plane 22 into the second prism 20, then regarded through eye pupil 50 Nethike embrane is imaged, and extraneous image must on the retina be imaged into eye pupil 50, then as schemed Shown in 4b, due to the present invention in the first prism 10, the second prism 20 and prism The optical systems of 30 compositions, will be close to the exit plane 22 of the second prism 20 and the of eyes The side plane 32 of prism 30 is set to parallel, and this causes that eyes see extraneous image just as saturating Cross a glass window and see outside, do not interfere with people's external image soon, can obtain Apparent image.

Due to the present invention have above-mentioned design, therefore using and manufacture on have it is following Advantage：

As shown in Figure 4 b, due to the present invention in the first prism 10, the second prism 20 and The optical system of the composition of prism 30, the light extraction of the second prism 20 that will be close to eyes is put down Face 22 is set to parallel with the side plane 32 of prism 30, and this causes that eyes see extraneous shadow As just as seeing outside through a glass window, not interfering with people's external image soon, Apparent image can be obtained, the shortcoming of existing curved surface is improved, is the present invention The shortcoming of prior art is broken through, is the main advantage of the present invention.

As shown in Figure 1 and Figure 2, due to the present invention in the first prism 10 by it is therein go out Optical plane 12 is designed as plane, so when the element of free form surface makes, it is possible to Datum level is done with the plane to measure and make corrections, obtain more accurate precision, Make manufacturing process more easy and quick so that each part also has same rule during manufacture Case marker is accurate, will be more convenient in production.

Due to reducing free form surface in design of the invention, manufacture is greatly reduced Cost and time, it is more suitable for volume production, energy reduces cost, is yet another advantage of the invention.

Structure described above is only presently preferred embodiments of the present invention, and is not used to limit The scope that the fixed present invention is implemented；Therefore work as and be familiar with equivalent done by this skill or easily become Change person, the impartial change made in the case where spirit and scope of the invention are not departed from and modification, For example：Substantially change the shape or size of element, coordinate other reflectance coatings, or make The species of panel is imaged with different prism materials and change, but uses the present invention Characteristic person, should all be covered by feature of the invention.

Claims

1. a kind of asymmetric curved surface prism image display optical system, it is characterised in that Including：

One first prism, its one end is provided with into light concave arc, is set in the side near eyes There is an exit plane, one is provided with the outside of the close visual field of the first prism in free form surface Reflection cambered surface；

One second prism, optical plane and exit plane are entered with one, and wherein this enters light and puts down Face is relative with the exit plane of the first prism and leaves a air gap, and the light extraction is flat Face is relative with eyes；

One prism, is the compensating plate of light, and concave arc is carried with one, can be relative The reflection cambered surface of the first prism is abutted in, and a side plane is provided with being close on the outside of the visual field, The side plane is parallel with the exit plane of the second prism；

One imaging panel, located at entering at light concave arc for the first prism；

Image light on the imaging panel goes out through the light concave arc directive that enters of the first prism Optical plane, is all-trans through exit plane and is incident upon reflex arc face, then is reflected and through light extraction Plane, by the air gap, and into the second prism to enter optical plane and light extraction flat Face, then through eye pupil in retina image-forming.

2. asymmetric curved surface prism image according to claim 1 shows optical system System, it is characterised in that the light concave arc that enters of the first prism is a spherical arc.

3. asymmetric curved surface prism image according to claim 1 shows optical system System, it is characterised in that the light concave arc that enters of the first prism is an aspherical arc.

4. asymmetric curved surface prism image according to claim 1 shows optical system System, it is characterised in that the light concave arc that enters of the first prism is a free form surface.

5. asymmetric curved surface prism image according to claim 1 shows optical system System, it is characterised in that the reflection cambered surface of the first prism is provided with plated film.

6. asymmetric curved surface prism image according to claim 1 shows optical system System, it is characterised in that the exit plane of the first prism and one end difference of reflection cambered surface Adjacent with light concave arc is entered, the other end is crossed to form the collecting end of the first prism.

7. asymmetric curved surface prism image according to claim 1 shows optical system System, it is characterised in that to enter optical plane, an exit plane and one anti-for one for the second prism Penetrate the prism wedge that end face is constituted.

8. asymmetric curved surface prism image according to claim 1 shows optical system System, it is characterised in that imaging panel is self-emission panel or non-self-luminous surface plate.

9. asymmetric curved surface prism image according to claim 1 shows optical system System, it is characterised in that the carrying concave arc of prism abuts in the reflection of the first prism In cambered surface, the mode that reclines therebetween is tight abutment, bonds or be reserved with Gas gap.

10. asymmetric curved surface prism image according to claim 1 shows optical system System, it is characterised in that the second prism is formed in one with prism.