Short Range Optical Amplification Module, Spectacles, Helmet and VR System

• US 20180120564A1
• Filed: 03/21/2016
• Published: 05/03/2018
• Est. Priority Date: 03/21/2016
• Status: Active Grant

• Current Assignee: Shenzhen Dlodlo New Technology Co., Ltd.
• Original Assignee: Shenzhen Dlodlo New Technology Co., Ltd.
• Inventors: Li, Gang, Tang, Weiping
• Granted Patent: US 10,324,292 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 17/08 Catadioptric systems used in non-imaging applications G02B19/00
• CPC Class Codes: G02B 2027/0123 comprising devices increasing the field of view
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 27/0081 with means for altering, e.g. enlarging, the entrance or exit pupil
• CPC Class Codes: G02B 27/01 Head-up displays
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 27/0983 being curved
• CPC Class Codes: G02B 27/10 Beam splitting or combining systems polarising systems G02B27/28; mixing and splitting light signals using optical waveguides G02B6/28; beam shaping, e.g. changing the cross-sectional area, by dividing or superposing multiple light beams G02B27/0905
• CPC Class Codes: G02B 27/14 operating by reflection only
• CPC Class Codes: G02B 27/28 for polarising used in stereoscopes G02B30/25
• CPC Class Codes: G02B 27/286 for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another G02B5/3083 takes precedence; light guide coupling means utilising polarising elements G02B6/34
• CPC Class Codes: G02B 27/40 Optical focusing aids
• CPC Class Codes: G02B 5/00 Optical elements other than lenses light guides G02B6/00; optical logic elements G02F3/00
• CPC Class Codes: G02B 5/30 Polarising elements light-modulating devices with active elements G02F1/00
• CPC Class Codes: G02B 5/3083 Birefringent or phase retarding elements G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001
• CPC Class Codes: G02F 1/01 for the control of the intensity, phase, polarisation or colour G02F1/29, G02F1/35 take precedence

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 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.

Claims

1. A short-range optical amplification module, comprising:

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;

a focal length fs2 of a reflection surface of the second optical surface meets the following condition;

F≤

fs2≤

5F, wherein F is a system focal length of the short-range optical amplification module, and F meets the following condition;

10 mm≤

F≤

35 mm.

2. The short-range optical amplification module according to claim 1, wherein, a focal length fs1 of the first optical surface meets the following condition:

|fs1|>

2F.

3. The short-range optical amplification module according to claim 1, wherein, a thickness H of the short-range optical amplification module meets the following condition:

8 mm≤

H≤

30 mm.

4. The short-range optical amplification module according to claim 1, wherein, the focal length fs2 of the reflection surface of the second optical surface meets the following condition:

1.5F≤

fs2≤

3F.

5. The short-range optical amplification module according to claim 4, wherein, the caliber D, through which the light beam that takes part in imaging via the short-range optical amplification module passes, meets the following condition:

0.3F<

D<

0.6F.

6. The short-range optical amplification module according to claim 5, wherein, the eye relief of the short-range optical amplification module is 5-15 mm.

7. A pair of spectacles, comprising:

the short-range optical amplification module according to claim 1, wherein the spectacles further comprise a screen, which is set coaxially or noncoaxially with the short-range optical amplification module.

8. A helmet, comprising:

the short-range optical amplification module according to claim 1, wherein the helmet further comprises a screen, which is set coaxially or noncoaxially with the short-range optical amplification module.

9. A VR system, comprising:

the spectacles according to claim 7.

10. A VR system, comprising:

the helmet according to claim 8.