CN206546463U - Prism combination - Google Patents

Abstract

The utility model provides a prism combination, including a prism and a lens, the prism includes incident side and outgoing side, and the outgoing side is the inclined plane, lens include incident side and lens side, and the incident side is the inclined plane, and the lens side is the protruding structure of passing through, is equipped with the reflectance coating on the protruding face of passing through, and the inclined plane projection parallel is leaned on prism outgoing side and the lens incident, and two inclined planes pass through the UV glue bonding. The combination of the prism and the lens enables imaging and focusing to be achieved simultaneously, light loss and eccentricity errors are reduced, and imaging precision is higher.

Description

Prism combination

technical field

The invention relates to the field of prism imaging, in particular to a prism combination.

Background technique

Today's technology uses the principle of transflection and semi-reflection in a wide range of fields. Generally, imaging is obtained through the combination of a prism layer and a reflective layer. However, due to the layered configuration of the current prism structure, there are gaps or bubbles between the two layers, or the central axis of the two layers is asymmetrical, resulting in a virtual image. Not very good imaging effect.

Contents of the invention

The invention proposes a prism combination, which solves the problems in the prior art.

Technical scheme of the present invention is realized like this:

The prism combination includes a prism and a lens, the prism includes an incident side and an outgoing side, the outgoing side is an inclined plane, and the lens includes an incident side and a lens side, the incident side is an inclined plane, and the lens side is a convex structure. A reflective film is provided on the transmissive surface, the projection of the oblique plane on the exit side of the prism and the incident side of the lens is parallel, and the two oblique planes are bonded by UV glue.

As a preferred solution of the present invention, the central axes of the prism and the lens are concentric.

As a preferred solution of the present invention, the inclined plane of the prism is A, and in side view projection, the angle AOL between plane A and the vertical plane is α, where 40°≤α≤50°.

As a preferred solution of the present invention, a semi-reflective coating is attached to the inclined plane of the prism, and the average reflectance of the semi-reflective coating is n, wherein 45%≤n≤55%.

As a preferred solution of the present invention, the wavelength threshold of the semi-reflective coating is m, where 420nm≤m≤680nm.

As a preferred solution of the present invention, the convex surface of the lens is a curved surface B, and a dielectric film is provided between the curved surface B and the reflective film.

As a preferred solution of the present invention, the curvature radius of the curved surface B is R, where 55≤R≤60.

As a preferred solution of the present invention, the wavelength threshold of the dielectric film is o, where 420nm≤o≤680nm.

As a preferred solution of the present invention, the UV glue is JDK OP1030 type glue.

Beneficial effects: the present invention proposes a prism combination, including a prism and a lens, the prism includes an incident side and an exit side, the exit side is an inclined plane, the lens includes an incident side and a lens side, and the incident side is an inclined plane , The lens side is a convex structure, and a reflective film is provided on the convex surface. The projection of the inclined plane on the outgoing side of the prism and the incident side of the lens is parallel, and the two inclined planes are bonded by UV glue. Through the combination of prism and lens, the imaging and focusing functions are realized at the same time, which reduces the light loss and decentering error, and makes the imaging precision higher.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the side view structure schematic diagram of the present invention;

FIG. 2 is a schematic top view of the structure shown in FIG. 1 .

In the figure, prism 1 and lens 2.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figure 1 and Figure 2, the prism combination includes a prism 1 and a lens 2, the prism 1 includes an incident side and an outgoing side, the outgoing side is an inclined plane, and the lens 2 includes an incident side and a lens side, and the incident side is an inclined plane , The lens side is a convex structure, and a reflective film is provided on the convex surface. The projection of the inclined plane on the outgoing side of the prism 1 and the incident side of the lens 2 is parallel, and the two inclined planes are bonded by UV glue.

The central axes of prism 1 and lens 2 are concentric. The inclined plane of the prism 1 is A, and in the side view projection, the angle AOL between the plane A and the vertical plane is α, where 40°≤α≤50°. Preferably there are 42°, 45°.

A semi-reflective coating is attached to the inclined plane of the prism 1, and the average reflectance of the semi-reflective coating is n, wherein 45%≤n≤55%. Preferably 47°, 50°, 53°.

The wavelength threshold of the semi-reflective coating is m, where 420nm≤m≤680nm.

The convex surface of the lens 2 is a curved surface B, and a dielectric film is arranged between the curved surface B and the reflective film. The radius of curvature of curved surface B is R, where 55≤R≤60. The wavelength threshold of the dielectric film is o, where 420nm≤o≤680nm.

The UV glue is Japan Denki Chemical OP1030 type glue.

The present invention has an integrated structure, so that the imaging and focusing functions can be realized at the same time, which is traditionally completed by gluing a prism + a convex lens. Reduced light loss (compared to gluing) reduces the eccentricity error caused by gluing, and the accuracy is higher.

Example 1

Among them, N=8.6mm, M=11.77mm, A-plane semi-reflective coating requirements: AOL=45°wavelength 420nm～680nm average transmittance 50%±5%.

Requirements for total reflection coating on curved surface of B: AOL=0° surface is coated with multi-layer dielectric film, and the average reflectance of wavelength 420nm～680nm is >98%.

Fastness: 3M 610 test tape is pasted on the coated surface and pulled in a 45° direction (25mm/s) for three consecutive times without stripping.

Humidity resistance: 60℃, 95%RH x168 hours, salt spray resistance: 35℃, 4.5%NaCI x24 hours

5. Gluing requirements are as follows:

The UV glue is designated Japan Denki Chemical OP1030UV.

GD341X-1 and GD341X-2 are closely glued, and the glued surface cannot exist.

Bubbles and foreign matter impurities, there should be no overflow glue residue on the glued side.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (9)

1. prism combination, it is characterized in that, comprise a prism (1) and a lens (2), described prism (1) comprises incident side and exit side, and exit side is inclined plane, and described lens (2) comprises incident side And the lens side, the incident side is an inclined plane, the lens side is a convex structure, a reflective film is provided on the convex surface, the projection of the inclined plane on the exit side of the prism (1) and the incident side of the lens (2) are parallel, and the two inclined planes pass through the UV Adhesive. 2. The prism combination according to claim 1, characterized in that, the central axes of the prism (1) and the lens (2) are concentric. 3. The prism combination according to claim 1, characterized in that, the inclined plane of the prism (1) is A, and in side view projection, the angle AOL between the plane A and the vertical plane is α, wherein 40°≤α≤ 50°. 4. The prism combination according to claim 1, characterized in that, the inclined plane of the prism (1) is provided with a semi-reflective coating, and the average reflectance of the semi-reflective coating is n, wherein 45%≤n≤55% %. 5 . The prism combination according to claim 4 , wherein the wavelength threshold value of the semi-reflective coating is m, where 420nm≤m≤680nm. 6. The prism combination according to claim 1, characterized in that, the convex surface of the lens (2) is a curved surface B, and a dielectric film is arranged between the curved surface B and the reflective film. 7. The prism combination according to claim 6, wherein the radius of curvature of the curved surface B is R, where 55≤R≤60. 8 . The prism combination according to claim 6 , wherein the wavelength threshold of the dielectric film is o, where 420nm≤o≤680nm. 9. The prism combination according to claim 1, characterized in that, the UV glue is NEC OP1030 glue.