阅读说明：本技术 一种旋转镜头及投影设备 (Rotating lens and projection equipment ) 是由 蔡静 于 2020-06-10 设计创作，主要内容包括：本发明公开了一种旋转镜头及投影设备,属于镜头技术领域。本发明提出了一种旋转镜头,包括镜头前组、旋转棱镜组和镜头后组,沿着光线传播方向,依次透过镜头前组、旋转棱镜组和镜头后组；所述镜头前组、镜头后组主要用于实现成像、放大；所述旋转棱镜组用于实现改变出射光方向。本发明的旋转镜头可改变出射光方向,使用本发明旋转镜头的投影设备可以在置放方式不变的情况下,实现投影角度及画面位置的改变,如投影在侧墙面和天花板墙面。本发明系统简洁,使用方便,性能可靠。(The invention discloses a rotary lens and projection equipment, and belongs to the technical field of lenses. The invention provides a rotary lens, which comprises a lens front group, a rotary prism group and a lens rear group, wherein the lens front group, the rotary prism group and the lens rear group sequentially penetrate through the lens front group, the rotary prism group and the lens rear group along the light propagation direction; the front lens group and the rear lens group are mainly used for realizing imaging and amplification; and the rotary prism group is used for changing the emergent light direction. The rotary lens can change the emergent light direction, and the projection equipment using the rotary lens can realize the change of the projection angle and the picture position under the condition of not changing the placement mode, such as projection on a side wall surface and a ceiling wall surface. The system is simple, convenient to use and reliable in performance.)

1. A rotary lens, comprising:

the front lens group is used for receiving a light beam to be imaged;

the rotating prism group is used for changing the emergent direction of the light beam to be imaged;

and the rear group of the lens is used for outputting the light beam to be imaged after the emergent direction is changed.

2. A rotary lens according to claim 1, wherein said rotary prism group comprises an isosceles right prism 1 and an isosceles right prism 2, one right-angle surface of the isosceles right prism 1 fits one right-angle surface of the isosceles right prism 2, and the isosceles right prism 1 and the isosceles right prism 2 can rotate around the normal of the fit right-angle surfaces as an axis; the inclined side surface of the isosceles right-angle prism 1 is opposite to the front lens group; the bevel face of the isosceles right-angle prism 2 is opposite to the rear lens group.

3. A rotary lens according to claim 2, wherein the hypotenuse face of the isosceles right prism 1 is coated with an antireflection film.

4. A rotary lens barrel according to claim 3, wherein the right-angle surface of the isosceles right prism 2 is coated with an antireflection film.

5. A rotary lens barrel according to claim 4, wherein the other of the right-angle faces of the isosceles right prism 1 is coated with a reflection increasing film.

6. A rotary lens barrel according to claim 2, wherein the hypotenuse face of the isosceles right prism 2 is coated with an antireflection film.

7. A rotary lens barrel according to claim 6, wherein the right-angle surfaces of the isosceles right prism 1 are coated with an antireflection film.

8. A rotary lens barrel according to claim 7, wherein the other of the right-angle faces of the isosceles right-angle prism 2 is coated with a reflection increasing film.

9. A projection device, comprising:

a rotary lens barrel according to any one of claims 1 to 8,

the front lens group and the isosceles right-angle prism 1 form a component and are fixed together with the optical machine, and the rear lens group and the isosceles right-angle prism 2 form a rotatable component.

Technical Field

The invention relates to the technical field of lenses, in particular to a rotary lens and projection equipment.

Background

Projection has been widely used in ordinary homes, office meeting rooms, educational institutions, and entertainment venues.

The projection product on the market only has one lens, and the emergent light direction is unique. If the emergent light direction is to be adjusted, for example, the emergent light is firstly projected on a side wall surface and then projected on a ceiling, the placing angle and the emergent light direction of a projection product need to be changed. However, the general projection products are difficult to stably place in multiple directions, often need to be realized by an additional bracket, and are not economical and simple.

Therefore, a lens and a projection product capable of greatly changing the emergent light direction are needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a rotary lens and a projection device, aiming at solving the technical problems in the background technology.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a rotary lens, which comprises a lens front group, a rotary prism group and a lens rear group, wherein the lens front group, the rotary prism group and the lens rear group sequentially penetrate through the lens front group, the rotary prism group and the lens rear group along the light propagation direction; the front lens group is used for receiving a light beam to be imaged; the rotating prism group is used for changing the emergent direction of the light beam to be imaged; and the rear group of the lens is used for outputting the light beam to be imaged after the emergent direction is changed.

Rotatory prism group contains isosceles right angle prism 1 and isosceles right angle prism 2, and a right angle face laminating isosceles right angle prism 2 of a right angle face of isosceles right angle prism 1, two prisms can rotate as the axle around the normal direction of laminating right angle face.

The hypotenuse face of isosceles right prism 1 has plated the antireflection coating, and the right-angle face that laminates with isosceles right prism 2 has plated the antireflection coating, and another right-angle face has plated and has increased the reflection coating.

The hypotenuse face of isosceles right prism 2 has plated the antireflection coating, and the right-angle face that laminates with isosceles right prism 1 has plated the antireflection coating, and another right-angle face has plated and has increased the reflection coating.

The front lens group and the isosceles right-angle prism 1 form a component, and the rear lens group and the isosceles right-angle prism 2 form a component.

When the cross section of two equal-waist right-angle prisms is similar to a diamond shape, the incident light direction is parallel to the emergent light direction.

When the cross section formed by the two equal-waist right-angle prisms is similar to a right-angled triangle, the incident light direction and the emergent light direction form an included angle of 90 degrees.

The invention also provides projection equipment, wherein the rotary lens is applied, the front lens group and the isosceles right-angle prism 1 form a component and are fixed with the optical machine, and the rear lens group and the isosceles right-angle prism 2 form a rotatable component. The switching between the mode 1 and the mode 2 can be realized by rotating the rotating component of the lens by 180 degrees. When the lens is in the shape 1, namely the section formed by the two equal-waist right-angle prisms is similar to a rhombus, and emergent light is parallel to incident light; when the lens is in the shape 2, namely the cross section formed by the two equal-waist right-angle prisms is similar to a right triangle, emergent light is deflected by 90 degrees relative to incident light.

Compared with the prior art, the invention has the beneficial effects that:

the rotary lens can change the emergent light direction, and the projection equipment using the rotary lens can realize the change of the projection angle and the picture position under the condition of not changing the placement mode, such as projection on a side wall surface and a ceiling wall surface. The system is simple, convenient to use and reliable in performance.

Drawings

FIG. 1 is a schematic view of a rotary lens according to the present invention;

FIG. 2 is a schematic diagram of embodiment 1 (incident light direction is parallel to emergent light direction);

FIG. 3 is a schematic diagram of embodiment 2 (the incident light direction is 90 ° to the emergent light direction) according to the present invention.

The labels in the figure are: 100 is the lens front group, 200 is the rotary prism group, 210 is isosceles right prism 1,211 is the hypotenuse face of isosceles right prism 1, 212 and 213 are the right-angle faces of isosceles right prism 1, 220 is isosceles right prism 2,221 is the hypotenuse face of isosceles right prism 2, 222 and 223 are the right-angle faces of isosceles right prism 2, 300 is the lens rear group, 400 is the rotation axis.

Detailed Description

The present invention will be further described with reference to the following examples, which are intended to illustrate only some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, other embodiments used by those skilled in the art without any creative effort belong to the protection scope of the present invention.