CN112188065B - Imaging device and electronic apparatus - Google Patents
Imaging device and electronic apparatus Download PDFInfo
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- CN112188065B CN112188065B CN202011066120.3A CN202011066120A CN112188065B CN 112188065 B CN112188065 B CN 112188065B CN 202011066120 A CN202011066120 A CN 202011066120A CN 112188065 B CN112188065 B CN 112188065B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
Abstract
The application discloses camera device, including sensitization chip (100), first lens mechanism (200) and second lens mechanism (300), first lens mechanism (200) are located between sensitization chip (100) and second lens mechanism (300), second lens mechanism (300) are including first diffraction lens (310) and the second diffraction lens (320) of rolling over, in the direction of throwing light to sensitization chip (100), first diffraction lens (310) of rolling over, second diffraction lens (320) of rolling over, first lens mechanism (200) and sensitization chip (100) set gradually, the ambient light through second lens mechanism (300) can be in proper order by first diffraction lens (310) and the diffraction lens (320) of rolling over diffraction, and the ambient light after the diffraction of rolling over can be thrown to sensitization chip (100) through first lens mechanism (200). The application also discloses an electronic device. The proposal can solve the contradiction between the thickness of the electronic equipment and the size of the camera device in the background technology.
Description
Technical Field
The application belongs to the technical field of communication equipment, and particularly relates to a camera device and electronic equipment.
Background
Electronic equipment is generally provided with an image pickup device, and an image pickup function is realized. As the user's shooting needs increase, the performance of the camera device continues to be optimized. In order to improve the imaging quality, the size of the imaging device configured in the electronic device is larger and larger, and thus better optical performance can be realized.
As electronic devices are becoming thinner and lighter, the thickness of the electronic devices is difficult to increase. In this case, the size of the imaging device is becoming larger, which is contradictory to the demand for the electronic device to be thinner, so that it is difficult for the electronic device to configure an imaging device with better performance, and obviously, this may affect the performance of the electronic device.
Disclosure of Invention
An object of the embodiments of the present application is to provide an image pickup apparatus and an electronic device, which can solve the contradiction between the thickness of the electronic device and the size of the image pickup apparatus in the background art.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, the embodiment of the application discloses a camera device, including the photosensitive chip, first lens mechanism and second lens mechanism, first lens mechanism locates between photosensitive chip and the second lens mechanism, second lens mechanism includes the diffraction lens of first refraction and the diffraction lens of second refraction, in the direction of throwing light to photosensitive chip, first refraction diffraction lens, the diffraction lens of second refraction, first lens mechanism and photosensitive chip set gradually, ambient light through second lens mechanism can be in proper order by the diffraction lens of first refraction and the diffraction lens of second refraction and refraction, and ambient light after the refraction can be through first lens mechanism throw to the photosensitive chip.
In a second aspect, an embodiment of the present application discloses an electronic device including the above-described image capturing apparatus.
This application adopts above-mentioned technical scheme can reach following beneficial effect:
the camera device disclosed by the embodiment of the application, through with some lenses change for the diffraction lens of first refraction and the diffraction lens of second refraction, because the chromatic aberration can be eliminated to the diffraction lens of first refraction and the diffraction lens of second refraction, and then can make camera device need not additionally to dispose the lens that is used for eliminating the chromatic aberration, thereby can reduce the lens quantity, this kind of structure can make camera device can eliminate the chromatic aberration and guarantee imaging quality, can reduce camera device's lens quantity again, and then can make the size of camera module diminish, finally can solve the contradiction between camera device's size of a dimension and electronic equipment's thickness.
Meanwhile, the first refraction diffraction lens and the second refraction diffraction lens are matched with each other, so that multi-level diffraction is realized, and further diffraction efficiency can be further improved.
Drawings
Fig. 1 is a schematic structural diagram of an image pickup apparatus disclosed in an embodiment of the present application;
FIG. 2 is an enlarged schematic structural view of an area surrounded by a dotted line box in FIG. 1;
fig. 3 is a schematic structural diagram of another image capturing apparatus disclosed in the embodiment of the present application;
fig. 4 is an enlarged structural diagram of an area surrounded by a dotted line box in fig. 3.
Description of reference numerals:
100-photosensitive chip,
200-first lens mechanism, 210-optic holder, 220-optic,
300-second lens mechanism,
300 a-first lens, 300 b-second lens,
310-first refractive diffractive optic, 311-first base layer, 311 a-first surface, 311 b-second surface, 311 c-third surface, 312-first diffractive protrusions,
320 second refraction lens, 321-second base layer, 321 a-sixth surface, 321 b-fifth surface, 321 c-fourth surface, 322 second diffraction projection,
330-imprinting the adhesive layer,
400-optical filter.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
As shown in fig. 1 to 4, an embodiment of the present application discloses an image pickup apparatus, which is applicable to an electronic device. The disclosed image pickup apparatus includes a photosensitive chip 100, a first lens mechanism 200, and a second lens mechanism 300.
The photosensitive chip 100 is a component for imaging in the image pickup apparatus, and in a specific shooting process, ambient light reflected by a shot object can be finally projected onto the photosensitive chip 100, and a photosensitive surface of the photosensitive chip 100 can convert an optical signal into an electrical signal corresponding to the optical signal, so that an imaging purpose is achieved. In a general case, the photosensitive chip 100 may be a CCD (Charge Coupled Device) Device, or may also be a CMOS (Complementary Metal Oxide Semiconductor) Device, and the specific kind of the photosensitive chip 100 is not limited in the embodiment of the present application.
The first lens mechanism 200 and the second lens mechanism 300 are both light distribution devices, and in a general case, the image pickup apparatus may include a lens holder, and the first lens mechanism 200 and the second lens mechanism 300 are both mounted in a lens barrel of a lens of the image pickup apparatus and then mounted in the lens holder through the lens, thereby realizing the mounting of the first lens mechanism 200 and the second lens mechanism 300.
In the embodiment of the present application, the first lens mechanism 200 may include a common lens 220, such as a convex lens, a concave lens, etc., and the embodiment of the present application does not limit the specific type and number of the lens 220 included in the first lens mechanism 200. In an alternative, the first lens mechanism 200 may include a lens holder 210 and at least two lenses 220, and the at least two lenses 220 are mounted on the lens holder 210, so that the lens holder 210 can be conveniently preassembled and integrally mounted, and finally, the assembly efficiency can be improved.
The second lens mechanism 300 may include a first folded diffraction lens 310 and a second folded diffraction lens 320, the first folded diffraction lens 310 and the second folded diffraction lens 320 may be sequentially disposed in a direction toward the photosensitive chip 100, and specifically, the first folded diffraction lens 310 and the second folded diffraction lens 320 may be disposed at the same height, so that an optical axis of the first folded diffraction lens 310 and an optical axis of the second folded diffraction lens 320 are collinear. Of course, the first folded diffraction mirror 310 and the second folded diffraction mirror 320 may be exchanged with each other.
The first refraction diffraction lens 310 and the second refraction diffraction lens 320 can refract and diffract the ambient light passing through, and according to the principle of refraction and diffraction, chromatic aberration is generated in the process of refraction and diffraction of the ambient light. Because the first refraction diffraction lens 310 and the second refraction diffraction lens 320 can refract the ambient light and diffract the ambient light, the chromatic aberration generated by the first refraction diffraction lens 310 and the second refraction diffraction lens 320 by diffracting the ambient light and the chromatic aberration generated by refracting the ambient light can be mutually offset, so that the chromatic aberration generated by the ambient light in the shooting process can be relieved or even eliminated. Further, the second lens unit 300 can have an optimal diffractive effect by setting the assembling relationship of the first refractive diffraction mirror 310 and the second refractive diffraction mirror 320.
In the direction of projecting light to the photosensitive chip 100, the first folding diffraction lens 310, the second folding diffraction lens 320, the first lens mechanism 200 and the photosensitive chip 100 are sequentially arranged, specifically, the first folding diffraction lens 310, the second folding diffraction lens 320, the first lens mechanism 200 and the photosensitive chip 100 can be sequentially arranged at intervals, so that the problem of mutual interference between internal devices of the image pickup device can be effectively avoided.
In a specific working process, the ambient light passing through the second lens mechanism 300 can be refracted and diffracted by the first refraction and diffraction lens 310 and the second refraction and diffraction lens 320 in sequence, and the refracted and diffracted ambient light can be projected onto the photosensitive chip 100 through the first lens mechanism 200, so as to finally realize photosensitive imaging of the photosensitive chip 100.
In the embodiment of the present application, the first folding diffraction lens 310 and the second folding diffraction lens 320 both have diffraction structures, and the diffraction structures can perform a function of diffracting ambient light. Specifically, the first fold diffraction mirror 310 may have a first diffraction structure, and the second fold diffraction mirror 320 may have a second diffraction structure.
The first diffractive structure may be located on one side of the first folded diffractive optic 310 and the second diffractive structure may be located on one side of the second folded diffractive optic 320. Specifically, the first diffractive structure may be located on the image side of the first folded diffractive lens 310, or may be located on the object side of the first folded diffractive lens 310. Similarly, the second diffractive structure may be located on the image side of the second folded diffractive lens 320, or on the object side of the second folded diffractive lens 320.
Of course, the first diffractive structure may be located inside the first folded diffractive lens 310, and the second diffractive structure may be located inside the second folded diffractive lens 320, and the embodiment of the present application does not limit the specific location of the first diffractive structure on the first folded diffractive lens 310, and similarly, the embodiment of the present application also does not limit the specific location of the second diffractive structure on the second folded diffractive lens 320.
In an optional scheme, the first diffraction structure and the second diffraction structure are respectively located on two opposite sides of the first refraction diffraction lens 310 and the second refraction diffraction lens 320, and the structures are favorable for protecting the first diffraction structure and the second diffraction structure and avoiding the conditions of abrasion, collision and the like.
The imaging device disclosed in the embodiment of the application improves the structure of the imaging device in the background technology, such that the second lens mechanism 300 includes a first folded diffractive optic 310 and a second folded diffractive optic 320, when the ambient light passes through the first folding diffraction lens 310 and the second folding diffraction lens 320 in sequence, the first refraction diffraction lens 310 and the second refraction diffraction lens 320 can make the chromatic aberration generated by diffraction and the chromatic aberration generated by refraction offset each other, in the direction of projecting light to the photosensitive chip 100, the first folding diffraction lens 310, the second folding diffraction lens 320, the first lens mechanism 200 and the photosensitive chip 100 are sequentially arranged, ambient light passing through the second lens mechanism 300 can be refracted and diffracted by the first folding diffraction lens 310 and the second folding diffraction lens 320 in sequence, and the refracted and diffracted ambient light can be projected onto the photosensitive chip 100 through the first lens mechanism 200, so as to realize imaging of the photosensitive chip 100.
The camera device disclosed in the embodiment of the application, through replacing some lenses with the first refraction diffraction lens 310 and the second refraction diffraction lens 320, because the chromatic aberration can be better eliminated by the first refraction diffraction lens 310 and the second refraction diffraction lens 320, and then the camera device can be enabled not to be additionally provided with lenses for eliminating the chromatic aberration, thereby the number of the lenses can be reduced, the structure can enable the camera device to eliminate the chromatic aberration and ensure the imaging quality, and the number of the lenses of the camera device can be reduced, so that the size of the camera module can be reduced, and finally the contradiction between the size of the camera device and the thickness of the electronic equipment can be solved.
Meanwhile, the first refraction diffraction lens 310 and the second refraction diffraction lens 320 are matched with each other, so that multi-layer diffraction is realized, and further diffraction efficiency can be further improved.
The imaging device disclosed by the embodiment of the application can realize multilayer diffraction, further can obtain higher 1-order diffraction efficiency (at least 99%), and can reduce the problems of stray light and glare generated by other-order diffracted light while improving the light inlet quantity.
In the embodiment of the present application, the second lens mechanism 300 may further include an embossed adhesive layer 330, the embossed adhesive layer 330 is disposed between the first folded diffractive optical element 310 and the second folded diffractive optical element 320, and the first folded diffractive optical element 310 and the second folded diffractive optical element 320 may be connected by the embossed adhesive layer 330. In this case, the embossed adhesive layer 330 can integrate the first folded diffraction lens 310 and the second folded diffraction lens 320, thereby facilitating the integrated installation in the image capturing device.
In an alternative scheme, the first folding diffraction lens 310 is coated with stamping glueThe second diffractive optic 320 is aligned with the direction of the imprinting paste, and is imprinted toward the imprinting paste, and then the imprinting paste is formed into the imprinting paste layer 330 by curing. For example, the imprint glue is cured by means of ultraviolet exposure, so that the first folded diffraction lens 310 and the second folded diffraction lens 320 are glued together. The embossed adhesive layer 330 can bond the first folded diffraction lens 310 and the second folded diffraction lens 320, and of course, the distance between the first folded diffraction lens 310 and the second folded diffraction lens 320 can be determined by adjusting the thickness of the embossed adhesive layer 330. In the embodiment of the present application, the imprinting adhesive layer 330 may be an ultraviolet curing imprinting adhesive or a thermosetting imprinting adhesive. Specifically, the thickness h of the imprinting adhesive layer 330iMay be greater than 0.5 μm and less than 500 μm.
In specific working process, the imprinting adhesive layer 330 can be a refractive index compensation layer, and then the difference of the refractive index of the diffraction surface of the first refraction diffraction lens 310 can be reduced, and then the manufacturing process difficulty of the first refraction diffraction lens 310 can be reduced, the refraction and diffraction efficiency can be improved, meanwhile, the light optimized and adjusted by the first refraction diffraction lens 310 and the imprinting adhesive layer 330 enters the second refraction diffraction lens 320 at a proper angle, the second refraction diffraction lens 320 refracts and diffracts the light again, therefore, the chromatic aberration generated by the diffraction of the second refraction diffraction lens 320 on the light and the chromatic aberration generated by the refraction on the light can be mutually offset, thereby the chromatic aberration generated by the light in the projection process can be eliminated, and further the projection quality can be improved.
In an optional scheme, the first folding diffraction lens 310 and the second folding diffraction lens 320 may both be glass structural members, in another optional scheme, the first folding diffraction lens 310 and the second folding diffraction lens 320 may be made of optical plastic by injection molding, in this case, the first folding diffraction lens 310 and the second folding diffraction lens 320 are both optical plastic structural members, and the optical plastic is light, so as to be beneficial to reducing the mass of the first folding diffraction lens 310 and the mass of the second folding diffraction lens 320, and further be beneficial to reducing the mass of a lens of the camera module. Under the condition that the camera device comprises the zoom motor, the zoom motor can drive the lens to move, and the quality of the lens can be reduced, so that the camera module does not need to be provided with a motor with higher power, and the cost of the camera device is reduced, and the energy consumption can be reduced.
In addition, the optical plastic structural part is formed by injection molding, so that the optical plastic structural part has the advantages of simplicity in processing, suitability for mass production, low processing cost and the like. In the embodiments of the present application, the optical plastic may be various, such as PC (Polycarbonate), COC (Cyclic Olefins copolymer), COP (Cyclic Olefins Polymer), etc., and the embodiments of the present application are not limited to specific types of optical plastics.
In the embodiment of the present application, the refractive indexes of the first folding diffraction mirror plate 310, the second folding diffraction mirror plate 320 and the imprinting glue layer 330 can be adjusted to achieve the optimal diffraction effect of the second lens mechanism 300. Specifically, the refractive index can be determined by selecting the thicknesses and materials of the first refractive diffraction mirror 310, the second refractive diffraction mirror 320 and the imprinting glue layer 330, and in an alternative scheme, the refractive index n of the first refractive diffraction mirror 310p1Greater than 1.3RIU (Refractive index unit) and less than 1.8RIU, or the Refractive index n of the second folded diffractive optic 320p2Greater than 1.3RIU and less than 1.8RIU, or the refractive index n of the imprint resist layer 330iGreater than 1.3RIU and less than 1.9RIU, the first refraction diffraction lens 310, the second refraction diffraction lens 320 and the impression glue layer 330 of this kind of refracting power scope can make the environment light of projection obtain better refraction effect when passing through to can make the colour difference that the refraction produced offset the colour difference that the diffraction produced better, can obtain better imaging quality finally.
In the embodiment of the present application, the first folding diffractive optic 310 may include a plurality of concentrically arranged first diffractive protrusions 312, and the plurality of concentrically arranged first diffractive protrusions 312 form a first diffractive structure of the first folding diffractive optic 310. When passing through the first refraction diffraction lens 310, the ambient light is refracted by the first refraction surface (which can be regarded as the surface of the first refraction diffraction lens 310 deviating from the first diffraction protrusion 312), and then is diffracted by the first diffraction protrusion 312, so as to achieve refractionAnd the chromatic aberration generated by diffraction are mutually counteracted. The plurality of first diffraction protrusions 312 are concentrically arranged, so that the first diffraction structure formed by the first refractive diffraction lens 310 is a sawtooth-shaped structure, and in an alternative scheme, in a radial direction from the center to the far center of the first refractive diffraction lens 310, the distance between the top ends of two adjacent first diffraction protrusions 312 (namely, the period Λ of the first diffraction structure)1) And the period of the first diffraction structure is gradually decreased from the center of the first diffraction structure to the edge of the first diffraction structure. The first refractive diffraction lens 310 is a circular lens, and the plurality of first diffraction protrusions 312 are annular protrusions concentrically arranged. This arrangement enables a better diffraction effect near the edge of the first folded diffractive optic 310.
The second fold diffraction optic 320 may include a plurality of concentrically disposed second diffraction protrusions 322, the plurality of concentrically disposed second diffraction protrusions 322 forming the second diffraction structure of the second fold diffraction optic 320. When passing through the second refraction diffraction lens 320, the ambient light is firstly diffracted by the second diffraction protrusion 322, and then is refracted by the second refraction surface (which may be regarded as the surface of the second refraction diffraction lens 320 deviating from the second diffraction protrusion 322), so as to achieve the purpose of mutually offsetting chromatic aberration generated by refraction and diffraction.
Similarly, the plurality of second diffraction protrusions 322 are concentrically arranged, so that the second diffraction structure of the second refraction mirror 320 is a saw-toothed structure, and in an alternative scheme, in a radial direction from the center to the center of the second refraction mirror 320, a distance between top ends of two adjacent second diffraction protrusions 322 (i.e. a period Λ of the second diffraction structure)2) And the period of the second diffraction structure is gradually decreased from the center of the second diffraction structure to the edge of the second diffraction structure. The second folded diffraction lens 320 is a circular lens, and the plurality of second diffraction protrusions 322 are annular protrusions concentrically arranged.
In a further aspect, the distance between the tips of two adjacent first diffractive protrusions 312 (i.e., the period Λ of the first diffractive structure)1) Can be greater than 0.5 μm and less than 300 μm, it being noted that the first diffractive projection 312 has a root andthe top of the first diffractive protrusion 312 is the top of the first diffractive protrusion 312, and the root of the first diffractive protrusion 312 is the bottom of the first diffractive protrusion 312. Through detection, the distance between the top ends of the two adjacent first diffraction bulges 312 can better ensure the diffraction effect, and is helpful for enabling the chromatic aberration generated by diffraction to offset the chromatic aberration generated by refraction.
Similarly, the distance between the tips of two adjacent second diffractive protrusions 322 (i.e., the period Λ of the second diffractive structure)2) It may be greater than 0.5 μm and less than 300 μm, and it should be noted that second diffractive protrusion 322 has a root and a top, where the top of second diffractive protrusion 322 is the top of second diffractive protrusion 322, and the root of second diffractive protrusion 322 is the bottom of second diffractive protrusion 322. Through detection, the distance between the top ends of the two adjacent second diffraction bulges 322 can better ensure the diffraction effect, and is helpful for enabling the chromatic aberration generated by diffraction to offset the chromatic aberration generated by refraction. In a specific embodiment, the period Λ of the first diffractive structure1May be related to the period Λ of the second diffractive structure2Are equal.
In a further aspect, the height h of the first diffractive protrusions 312d1May be larger than 0.1 μm and smaller than 30 μm, and the height of the first diffraction projections 312 can be detected to ensure a good diffraction effect. Note that the height of the first diffraction projections 312 refers to the dimension in the direction from the bottom end to the top end of the first diffraction projections 312. Specifically, in a radial direction from the center of the first folded diffraction mirror plate 310 to the center, the heights of the first diffraction protrusions 312 are decreased or increased, and of course, the heights of all the first diffraction protrusions 312 of the first folded diffraction mirror plate 310 may be equal.
Similarly, the height h of the second diffractive protrusions 322d2May be larger than 0.1 μm and smaller than 30 μm, and the height of the second diffraction projections 322 can be detected to ensure a good diffraction effect. Note that the height of the second diffraction projections 322 refers to the dimension in the direction from the bottom end to the top end of the second diffraction projections 322. In particular, in a radial direction from the center of the second diffractive structure to the center, the second diffractive structureThe heights of the diffraction protrusions 322 are gradually decreased or increased, and of course, the heights of all the second diffraction protrusions 322 of the second fold diffraction lens 320 may be equal.
In order to make the refractive and diffractive effect of the second lens mechanism 300 better and make the internal layout of the second lens mechanism 300 more compact, in an alternative scheme, the first diffractive protrusion 312 and the second diffractive protrusion 322 may be respectively disposed on the surfaces of the first refractive diffractive optic 310 and the second refractive diffractive optic 320.
In a further technical solution, the first folding diffractive lens 310 may further include a first base layer 311, the first diffractive protrusion 312 is disposed on the first base layer 311, a surface of the first base layer 311 departing from the first diffractive protrusion 312 is a first surface 311a, the first surface 311a may be a plane, a concave surface or a convex surface, a specific surface type of the first surface 311a may be a spherical surface or an aspheric surface, and the specific surface type of the first surface 311a is not limited in this embodiment of the application. In the case that the surface of the first base layer 311 facing away from the first diffractive protrusions 312 (i.e., the first surface 311a) is spherical or aspherical, the refraction and diffraction effects of the first refractive diffraction lens 310 can be more optimized.
The first base layer 311 can provide a setting basis for the first diffraction projections 312, so that the first diffraction projections 312 have high strength and are not easily damaged. At the same time, the first base layer 311 also facilitates the molding of the first diffraction protrusions 312. Of course, the first base layer 311 is also a light-transmitting material, and needs to be able to ensure the passage of ambient light. Specifically, the material of the first base layer 311 is the same as that of the first diffractive protrusion 312, and may be made of glass, optical plastic, or other materials.
Similarly, the second diffractive optical element 320 may further include a second base layer 321, the second diffractive protrusion 322 is disposed on the second base layer 321, a surface of the second base layer 321 facing away from the second diffractive protrusion 322 is a sixth surface 321a, the sixth surface 321a may be a plane, a concave surface, or a convex surface, a surface type of the sixth surface 321 may be a spherical surface or an aspheric surface, and the specific surface type of the sixth surface 321a is not limited in this embodiment of the application. In the case where the surface (sixth surface 321a) of the second base layer 321 facing away from the second diffractive protrusions 322 is a spherical surface or an aspherical surface, the refractive effect of the second folded diffractive lens 320 can be more optimized.
The second base layer 321 can provide a setting base for the second diffraction protrusions 322, so that the second diffraction protrusions 322 have high strength and are not easily damaged. At the same time, the second base layer 321 also facilitates molding of the second diffraction protrusions 322. Of course, the second base layer 321 is also a light-transmitting material, and needs to be able to ensure the passage of ambient light. Specifically, the material of the second base layer 321 is the same as that of the second diffractive protrusion 322, and may be made of glass, optical plastic, or other materials.
In the embodiment of the present application, the thickness h of the first base layer 311p1May be greater than 0.05mm and less than 0.6mm, or, the thickness h of the second base layer 321p2The refractive and diffractive effects of the first refractive and diffractive optical element 310 and the second refractive and diffractive optical element 320 can be changed by properly adjusting the thicknesses of the first base layer 311 and the second base layer 321, which can be greater than 0.05mm and less than 0.6mm, and the refractive and diffractive effects of the second lens mechanism 300 can be better by detecting the thicknesses of the first base layer 311 and the second base layer 321 within the above-mentioned thickness range.
In a specific embodiment, in the case that the first surface 311a or the sixth surface 321a is an aspheric surface, the aspheric surface equation of the first surface 311a and the sixth surface 321a is shown in the following formula (1):
in the formula (1), c is the curvature of the first surface 311a or the sixth surface 321a, the curvatures of the first surface 311a and the sixth surface 321a may be the same or different, K is a conic constant, a2nIs a phase coefficient of 2n, r is the distance of the ambient light from the optical axis, which is the optical axis of the first folded diffraction lens 310 and the second folded diffraction lens 320, x1The distance between each point of the first surface 311a or the sixth surface 321a and the corresponding base surface, which is a surface passing through the center of the first surface 311a or the sixth surface 321a and perpendicular to the optical axis, is the distance along the optical axis.
In another specific embodiment, the surface of the first base layer 311 for supporting the first diffractive protrusions 312 is a second surface 311b, the second surface 311b can be regarded as a reference surface of the first diffractive structure, and the second surface 311b can be a plane, a spherical surface or an aspheric surface, and likewise, the specific surface type of the second surface 311b is not limited by the embodiments of the present application. The surface on which the tips of all the first diffractive protrusions 312 are located is the third surface 311 c.
In the case where the second surface 311b is an aspheric surface, the surface equation of the first diffractive structure is shown in the following formula (2):
in the formula (2), xd1Is the distance of each point of the first diffractive structure from the reference plane of the first diffractive structure, the distance being the distance in the optical axis direction, c is the curvature of the second surface 311b, K is the conic constant, a2nIs aspheric coefficient of 2n, r is distance of ambient light from the optical axis, n is number of diffraction zones included in the first diffraction structure counted from the center to the edge of the first folded diffraction lens 310, i.e. number of first diffraction protrusions 312, in case that the first diffraction protrusions 312 are annular protrusions, one annular protrusion is one diffraction zone, h isd10.1 μm < h for the height of the first diffractive structure, i.e., the height of the first diffractive protrusions 312, i.e., the distance between the third surface 311c and the second surface 311b, calculated by scalar diffraction theoryd1＜30μm，φ1The optical path length resulting from diffraction for the first diffractive structure can be calculated by the following formula (3).
φ1＝(C2r2+C4r4+C6r6+…+C2nr2n)×2π/λ (3)
In the formula (3), C2nIs the phase coefficient to the power of 2n, λ is the wavelength of the ambient light, and r is the distance of the ambient light from the optical axis.
In yet another embodiment, the surface of the second base layer 321 for supporting the second diffractive protrusion 322 is a fifth surface 321b, the fifth surface 321b can be regarded as a reference surface of the second diffractive structure, and the fifth surface 321b can be a plane, a spherical surface or an aspheric surface, and likewise, the specific surface type of the fifth surface 321b is not limited in the embodiments of the present application. The surface on which the tips of all the second diffraction protrusions 322 are located is the fourth surface 321 c.
In the case where the fifth surface 321b is an aspheric surface, the surface equation of the second diffractive structure is shown in the following formula (4):
in the formula (4), xd2Is a distance of each point of the second diffraction structure from a reference plane of the second diffraction structure, the distance being a distance in the optical axis direction, c is a curvature of the fifth surface 321b, K is a conic constant, a2nIs aspheric coefficient of 2n, r is distance of ambient light from the optical axis, n is number of diffraction zone included in the second diffraction structure counted from the center to the edge of the second diffraction lens 320, i.e. number of second diffraction protrusions 322, in case that the second diffraction protrusions 322 are annular protrusions, one annular protrusion is one diffraction zone, h isd20.1 μm < h for the height of the second diffractive structure, i.e., the height of the second diffractive protrusions 322, i.e., the distance between the fourth surface 321c and the fifth surface 321b, calculated by scalar diffraction theoryd2＜30μm，φ2The optical path length for diffraction by the second diffraction structure can be calculated by the following equation (5).
φ2＝(C2r2+C4r4+C6r6+…+C2nr2n)×2π/λ (5)
In the formula (5), C2nIs the phase coefficient to the power of 2n, λ is the wavelength of the ambient light, and r is the distance of the ambient light from the optical axis.
In the embodiment of the present application, the 1 st order diffraction of the diffraction structure is the imaging diffraction order, and the other orders diffraction light can be glare, and further has an adverse effect on the imaging, and the first diffraction junction is used for reducing the glare phenomenon so that the 1 st order diffraction can reach the maximum efficiencyHeight h of the structured1And height h of the second diffractive structured2According to the refractive index difference deltan between the first refraction diffraction lens 310 and the second refraction diffraction lens 320 and the embossed glue layer 3301＝|np1-niL and Δ n2＝|ni-np2And is determined by scalar diffraction theory calculation, where np1And np2The refractive indexes of the first folded diffraction lens 310 and the second folded diffraction lens 320, niIs the refractive index of the imprint glue layer 330.
In an alternative, the first folding diffraction lens 310 and the second folding diffraction lens 320 may be an integral injection molding structure, that is, during the manufacturing process, the first base layer 311 and the first diffraction protrusion 312 may be formed together, and similarly, the second base layer 321 and the second diffraction protrusion 322 may be formed together, and this manufacturing process has the advantages of simple processing, high production efficiency, and the like.
In the embodiment of the present application, the second lens mechanism 300 may further include a first lens 300a and a second lens 300b, the first lens 300a may include a first refraction and diffraction lens 310 and a second refraction and diffraction lens 320, and the second lens 300b is located on a side of the first lens 300a facing away from the first lens mechanism 200, or the second lens 300b is located between the first lens 300a and the first lens mechanism 200, wherein the second lens 300b may serve as an auxiliary photographing lens and cooperate with the first lens mechanism 200 to make the second lens mechanism 300 more effective in refraction and diffraction, and in an alternative, in a case that the second lens 300b is a combination of the first refraction and diffraction lens 310 and the second refraction and diffraction lens 320, the second lens 300b is located between the first lens 300a and the first lens mechanism 200, so that better protection is achieved.
In the embodiment of the present application, the image capturing apparatus may further include an optical filter 400, the optical filter 400 is located between the photosensitive chip 100 and the first lens mechanism 200, and the ambient light passing through the first lens mechanism 200 can be filtered by the optical filter 400 and then projected onto the photosensitive chip 100. The filter 400 can filter out interference light of the camera device in the shooting process, the type of the filter 400 can be various, in an optional scheme, the filter 400 can be an infrared filter, and the infrared filter can absorb infrared light in the ambient light passing through the first lens mechanism 200, so that the imaging effect of the camera device is better.
In the imaging device disclosed in the embodiment of the present application, the total number N of the lenses including the first folded diffraction lens 310 and the second folded diffraction lens 320 may satisfy that N is greater than or equal to 4 and less than or equal to 9. Wherein, all the lens surfaces of all the lenses at least comprise 4 aspheric surfaces.
Based on the image pickup device disclosed by the embodiment of the application, the electronic equipment disclosed by the embodiment of the application comprises the image pickup device.
The electronic device disclosed in the embodiment of the present application may be a smart phone, an AR (Augmented Reality) device, a game machine, an electronic book, or the like, and the embodiment of the present application does not limit the specific kind of the electronic device.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (13)
1. An image pickup apparatus is characterized by comprising a photosensitive chip (100), a first lens mechanism (200) and a second lens mechanism (300), the first lens mechanism (200) is arranged between the photosensitive chip (100) and the second lens mechanism (300), the second lens mechanism (300) comprises a first folded diffraction lens (310) and a second folded diffraction lens (320), the first refraction diffraction lens (310), the second refraction diffraction lens (320), the first lens mechanism (200) and the photosensitive chip (100) are arranged in sequence in the direction of projecting light to the photosensitive chip (100), ambient light passing through the second lens mechanism (300) can be refracted and diffracted by the first folding diffraction lens (310) and the second folding diffraction lens (320) in sequence, the environment light after refraction and diffraction can be projected onto the photosensitive chip (100) through the first lens mechanism (200);
the second lens mechanism (300) further comprises an imprinting adhesive layer (330), the imprinting adhesive layer (330) is arranged between the first refraction diffraction lens (310) and the second refraction diffraction lens (320), the first refraction diffraction lens (310) and the second refraction diffraction lens (320) are connected through the imprinting adhesive layer (330), and the imprinting adhesive layer (330) is a refractive index compensation layer.
2. The image capture device of claim 1, wherein the thickness of the imprint gel layer (330) is greater than 0.5 μ ι η and less than 500 μ ι η, or wherein the refractive index of the imprint gel layer (330) is greater than 1.3RIU and less than 1.9 RIU.
3. The imaging device according to claim 1, wherein the first folded diffractive optic (310) and the second folded diffractive optic (320) are both injection molded structures.
4. The image capturing device as claimed in claim 1, wherein the refractive index of the first folded diffractive optic (310) is greater than 1.3RIU and less than 1.8RIU, or the refractive index of the second folded diffractive optic (320) is greater than 1.3RIU and less than 1.8 RIU.
5. The image pickup apparatus according to claim 1, wherein the first refractive diffraction lens (310) comprises a plurality of first diffraction protrusions (312) concentrically arranged, and in a radial direction from a center of the first refractive diffraction lens (310) to the center, distances between tips of two adjacent first diffraction protrusions (312) decrease; and/or the first and/or second light sources,
the second refraction diffraction lens (320) comprises a plurality of second diffraction bulges (322) which are concentrically arranged, and the distance between the top ends of two adjacent second diffraction bulges (322) is gradually reduced in the radial direction from the center of the second refraction diffraction lens (320) to the center.
6. The imaging device according to claim 5, wherein a distance between tips of two adjacent first diffraction projections (312) is greater than 0.5 μm and less than 300 μm, and/or a distance between tips of two adjacent second diffraction projections (322) is greater than 0.5 μm and less than 300 μm.
7. The imaging device according to claim 5, characterized in that the height of the first diffractive bump (312) is greater than 0.1 μm and less than 30 μm and/or the height of the second diffractive bump (322) is greater than 0.1 μm and less than 30 μm.
8. The imaging apparatus according to claim 5, wherein the first diffraction projection (312) and the second diffraction projection (322) are provided on surfaces of the first folded diffraction lens (310) and the second folded diffraction lens (320), respectively.
9. The image pickup apparatus according to claim 5, wherein the first folded diffractive optic (310) includes a first base layer (311), the first diffractive protrusion (312) being provided on the first base layer (311); and/or the second fold diffraction lens (320) comprises a second base layer (321), and the second diffraction bulge (322) is arranged on the second base layer (321).
10. The image pickup apparatus according to claim 1, wherein the thickness of the first base layer (311) is greater than 0.05mm and less than 0.6mm, or the thickness of the second base layer (321) is greater than 0.05mm and less than 0.6 mm.
11. The image pickup apparatus according to claim 1, wherein the second lens mechanism (300) includes a first lens (300a) and a second lens (300b), the first lens (300a) includes the first folded diffractive optic (310) and the second folded diffractive optic (320), and the second lens (300b) is located on a side of the first lens (300a) facing away from the first lens mechanism (200), or the second lens (300b) is located between the first lens (300a) and the first lens mechanism (200).
12. The image pickup apparatus according to claim 1, further comprising an optical filter (400), wherein the optical filter (400) is located between the photosensitive chip (100) and the first lens mechanism (200).
13. An electronic apparatus characterized by comprising the image pickup device according to any one of claims 1 to 12.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011066120.3A CN112188065B (en) | 2020-09-30 | 2020-09-30 | Imaging device and electronic apparatus |
| PCT/CN2021/120564 WO2022068709A1 (en) | 2020-09-30 | 2021-09-26 | Photographing apparatus and electronic device |
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| CN202011066120.3A CN112188065B (en) | 2020-09-30 | 2020-09-30 | Imaging device and electronic apparatus |
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| CN112188065B true CN112188065B (en) | 2022-02-15 |
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| CN112180603B (en) * | 2020-09-30 | 2023-05-19 | 维沃移动通信有限公司 | Projection device and intelligent glasses |
| CN112188065B (en) * | 2020-09-30 | 2022-02-15 | 维沃移动通信有限公司 | Imaging device and electronic apparatus |
| CN112882143A (en) * | 2021-01-26 | 2021-06-01 | 维沃移动通信有限公司 | Microprism, camera module and electronic equipment |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5044706A (en) * | 1990-02-06 | 1991-09-03 | Hughes Aircraft Company | Optical element employing aspherical and binary grating optical surfaces |
| US6514674B1 (en) * | 1999-03-11 | 2003-02-04 | Canon Kabushiki Kaisha | Method of forming an optical element |
| CN1412591A (en) * | 2001-10-12 | 2003-04-23 | 柯尼卡株式会社 | Objective lens and optical pickup head |
| CN1677136A (en) * | 2004-04-01 | 2005-10-05 | 佳能株式会社 | Diffractive optical element and optical system including the same |
| US7016114B1 (en) * | 1999-10-12 | 2006-03-21 | Canon Kabushiki Kaisha | Diffraction optical device and optical system including same |
| CN1766695A (en) * | 2004-10-25 | 2006-05-03 | 三星电机株式会社 | Optical system using diffraction optical element |
| CN101052912A (en) * | 2004-08-20 | 2007-10-10 | 阿波罗光学系统公司 | Diffractive lenses for vision correction |
| CN101124496A (en) * | 2005-02-22 | 2008-02-13 | 株式会社尼康 | Diffractive optical element |
| CN101231357A (en) * | 2007-01-22 | 2008-07-30 | 佳能株式会社 | Laminated diffraction optical element |
| CN101271168A (en) * | 2007-03-23 | 2008-09-24 | 佳能株式会社 | Diffractive optical element, optical system and optical apparatus |
| CN101533115A (en) * | 2008-03-12 | 2009-09-16 | 佳能株式会社 | Diffractive optical element, optical system, and optical apparatus |
| CN101813797A (en) * | 2010-03-03 | 2010-08-25 | 长春理工大学 | Optimal design method of multilayer diffraction optical element |
| CN102159659A (en) * | 2008-09-17 | 2011-08-17 | 3M创新有限公司 | Optical adhesive with diffusive properties |
| CN102628981A (en) * | 2011-02-04 | 2012-08-08 | 株式会社理光 | Zoom lens, camera and carrying type information terminal device |
| CN102906615A (en) * | 2010-05-24 | 2013-01-30 | 株式会社尼康 | Telescope optical system and optical device provided therewith |
| CN108474878A (en) * | 2016-01-08 | 2018-08-31 | 大日本印刷株式会社 | Diffraction optical element and light irradiation device |
| CN109031592A (en) * | 2018-07-26 | 2018-12-18 | 华为技术有限公司 | Pick-up lens, camera module and terminal |
| CN111615649A (en) * | 2018-01-16 | 2020-09-01 | 株式会社尼康 | Diffractive optical element, optical system, optical apparatus, and method for manufacturing diffractive optical element |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707428B (en) * | 2012-05-22 | 2014-06-04 | 长春理工大学 | Diffractive-refractive mixed type eyepiece used for curvature image plane with long exit pupil distance |
| WO2019019625A1 (en) * | 2017-07-25 | 2019-01-31 | 浙江舜宇光学有限公司 | Camera lens |
| CN112188065B (en) * | 2020-09-30 | 2022-02-15 | 维沃移动通信有限公司 | Imaging device and electronic apparatus |
-
2020
- 2020-09-30 CN CN202011066120.3A patent/CN112188065B/en active Active
-
2021
- 2021-09-26 WO PCT/CN2021/120564 patent/WO2022068709A1/en active Application Filing
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5044706A (en) * | 1990-02-06 | 1991-09-03 | Hughes Aircraft Company | Optical element employing aspherical and binary grating optical surfaces |
| US6514674B1 (en) * | 1999-03-11 | 2003-02-04 | Canon Kabushiki Kaisha | Method of forming an optical element |
| US7016114B1 (en) * | 1999-10-12 | 2006-03-21 | Canon Kabushiki Kaisha | Diffraction optical device and optical system including same |
| CN1412591A (en) * | 2001-10-12 | 2003-04-23 | 柯尼卡株式会社 | Objective lens and optical pickup head |
| CN1677136A (en) * | 2004-04-01 | 2005-10-05 | 佳能株式会社 | Diffractive optical element and optical system including the same |
| CN101052912A (en) * | 2004-08-20 | 2007-10-10 | 阿波罗光学系统公司 | Diffractive lenses for vision correction |
| CN1766695A (en) * | 2004-10-25 | 2006-05-03 | 三星电机株式会社 | Optical system using diffraction optical element |
| CN101124496A (en) * | 2005-02-22 | 2008-02-13 | 株式会社尼康 | Diffractive optical element |
| CN101231357A (en) * | 2007-01-22 | 2008-07-30 | 佳能株式会社 | Laminated diffraction optical element |
| CN101271168A (en) * | 2007-03-23 | 2008-09-24 | 佳能株式会社 | Diffractive optical element, optical system and optical apparatus |
| CN101533115A (en) * | 2008-03-12 | 2009-09-16 | 佳能株式会社 | Diffractive optical element, optical system, and optical apparatus |
| CN102159659A (en) * | 2008-09-17 | 2011-08-17 | 3M创新有限公司 | Optical adhesive with diffusive properties |
| CN101813797A (en) * | 2010-03-03 | 2010-08-25 | 长春理工大学 | Optimal design method of multilayer diffraction optical element |
| CN102906615A (en) * | 2010-05-24 | 2013-01-30 | 株式会社尼康 | Telescope optical system and optical device provided therewith |
| CN102628981A (en) * | 2011-02-04 | 2012-08-08 | 株式会社理光 | Zoom lens, camera and carrying type information terminal device |
| CN108474878A (en) * | 2016-01-08 | 2018-08-31 | 大日本印刷株式会社 | Diffraction optical element and light irradiation device |
| CN111615649A (en) * | 2018-01-16 | 2020-09-01 | 株式会社尼康 | Diffractive optical element, optical system, optical apparatus, and method for manufacturing diffractive optical element |
| CN109031592A (en) * | 2018-07-26 | 2018-12-18 | 华为技术有限公司 | Pick-up lens, camera module and terminal |
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|---|---|
| WO2022068709A1 (en) | 2022-04-07 |
| CN112188065A (en) | 2021-01-05 |
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