Short-range optical amplification module, spectacles, helmet and VR system

• US 10,018,845 B2
• Filed: 03/21/2016
• Issued: 07/10/2018
• 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
• Primary Examiner(s): GIESY, ADAM
• Application Number:
  US15/300,007
• Publication Number:
  US 20180164590A1
• Time in Patent Office: 841 Days
• 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 27/01 Head-up displays
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 27/0977 Reflective elements
• CPC Class Codes: G02B 27/28 for polarising used in stereoscopes G02B30/25
• CPC Class Codes: G02B 27/283 used for beam splitting or combining
• CPC Class Codes: G06F 3/011 Arrangements for interaction with the human body, e.g. for user immersion in virtual reality blind teaching G09B21/00

Abstract

Disclosed are a short-range optical amplification module, spectacles, a helmet and a VR system. The amplification module includes a reflective polarizing plate, a first phase delay plate, a second lens and a second phase delay plate that are arranged in turn, and a first lens is further set on either side of any one of the reflective polarizing plate, the first phase delay plate, the second lens and the second phase delay plate; in the second lens, the optical surface adjacent to the second phase delay plate is a transflective optical surface; the first focal length f2 of the second lens meets the condition: 1.2F≤f2≤2F, wherein F is the system focal length of the optical amplification module. By performing parameter refining on the first focal length f2 that influences the optical amplification effect, the module can keep a small overall thickness while obtaining a large optical amplification effect, and the VR device can realize a good 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 reflective polarizing plate, a first phase delay plate, a second lens, and a second phase delay plate that are arranged sequentially, wherein;

a first lens is further set on either side of any one of the reflective polarizing plate, the first phase delay plate, the second lens, and the second phase delay plate;

in the second lens, the optical surface adjacent to the second phase delay plate is a transflective optical surface; and

the first focal length f2 of the second lens meets the following condition;

1.2F≤

f2≤

2F, wherein F is the system focal length of the short-range optical amplification module.

2. The short-range optical amplification module according to claim 1, wherein, the effective focal length fs4 of the reflection surface of the transflective optical surface meets the following condition:

1.5F≤

fs4≤

5F.

3. The short-range optical amplification module according to claim 2, wherein, the effective focal length fs4 of the reflection surface of the transflective optical surface meets the following condition:

1.5F≤

fs4≤

2.4F.

4. The short-range optical amplification module according to claim 3, wherein, the effective focal length fs4 of the reflection surface of the transflective optical surface is 2.1F.

5. The short-range optical amplification module according to claim 1, wherein, the first focal length f2 of the second lens meets the following condition:

1.6F≤

f2≤

2F.

6. The short-range optical amplification module according to claim 1, wherein, in the second lens, the focal length fs3 of the optical surface adjacent to the first lens meets the following condition:

|fs3|≥

2F.

7. The short-range optical amplification module according to claim 1, wherein, the focal length f1 of the first lens meets the following condition:

|f1|≥

4F.

8. The short-range optical amplification module according to claim 1, wherein, the thickness of the short-range optical amplification module is 8˜

12 mm.

9. The short-range optical amplification module according to claim 1, wherein, the eye relief of the short-range optical amplification module is 5˜

10 mm.

10. The short-range optical amplification module according to claim 1, wherein, the aperture D, through which the light that takes part in imaging via the second lens and the first lens passes, meets the following condition:

0.4F≤

D≤

0.6F.

11. Short-range optical amplification spectacles, comprising:

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

12. A short-range optical amplification helmet, comprising:

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

13. A short-range optical amplification VR system, comprising:

the spectacles according to claim 11.