Short range optical amplification module, spectacles, helmet and VR system
First Claim
1. A short-range optical amplification module, comprising:
- a transflective mirror and a reflective polarizing plate that are arranged sequentially from an object side to an image side, wherein;
the transflective mirror includes a first optical surface and a second optical surface;
the second optical surface is a transflective optical surface, and the second optical surface is for arranging adjacent to a first phase delay plate;
the first optical surface is for arranging adjacent to a second phase delay plate; and
a focal length of a reflection surface of the second optical surface is greater than or equal to a system focal length of the short-range optical amplification module and is less than or equal to five times the system focal length of the short-range optical amplification module, and the system focal length of the short-range optical amplification module is greater than or equal to 10 mm and is less than or equal to 35 mm.
1 Assignment
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Accused Products
Abstract
The present invention discloses a short-range optical amplification module, which includes a first phase delay plate, a transflective mirror, a second phase delay plate and a reflective polarizing plate that are arranged sequentially, wherein: the transflective mirror includes a first optical surface and a second optical surface; the first optical surface is adjacent to the second phase delay plate; the second optical surface is a transflective optical surface, and the second optical surface is adjacent to the first phase delay plate; the focal length fs2 of the reflection surface of the second optical surface meets the following condition: F≤fs2≤5F, wherein F is the system focal length of the short-range optical amplification module, and F meets the following condition: 10 mm≤F≤35 mm. By performing parameter refining on the fs2 that influences the optical amplification effect, the module can keep a small overall thickness while obtaining a large optical amplification effect, and it can be applied in a small-size virtual reality (VR) device, so that the VR device can realize a wide field angle, a large eyebox and a high-quality imaging effect, and hence a better user experience.
16 Citations
10 Claims
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1. A short-range optical amplification module, comprising:
- a transflective mirror and a reflective polarizing plate that are arranged sequentially from an object side to an image side, wherein;
the transflective mirror includes a first optical surface and a second optical surface; the second optical surface is a transflective optical surface, and the second optical surface is for arranging adjacent to a first phase delay plate; the first optical surface is for arranging adjacent to a second phase delay plate; and a focal length of a reflection surface of the second optical surface is greater than or equal to a system focal length of the short-range optical amplification module and is less than or equal to five times the system focal length of the short-range optical amplification module, and the system focal length of the short-range optical amplification module is greater than or equal to 10 mm and is less than or equal to 35 mm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- a transflective mirror and a reflective polarizing plate that are arranged sequentially from an object side to an image side, wherein;
Specification