WO2017113255A1 - 头戴式显示设备 - Google Patents

头戴式显示设备 Download PDF

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Publication number
WO2017113255A1
WO2017113255A1 PCT/CN2015/099997 CN2015099997W WO2017113255A1 WO 2017113255 A1 WO2017113255 A1 WO 2017113255A1 CN 2015099997 W CN2015099997 W CN 2015099997W WO 2017113255 A1 WO2017113255 A1 WO 2017113255A1
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WO
WIPO (PCT)
Prior art keywords
optical lens
lens
telescope
optical
window
Prior art date
Application number
PCT/CN2015/099997
Other languages
English (en)
French (fr)
Inventor
施宏艳
Original Assignee
深圳市柔宇科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市柔宇科技有限公司 filed Critical 深圳市柔宇科技有限公司
Priority to EP15911883.5A priority Critical patent/EP3399363A4/en
Priority to US15/751,415 priority patent/US10347216B2/en
Priority to PCT/CN2015/099997 priority patent/WO2017113255A1/zh
Priority to CN201580076051.5A priority patent/CN107250883A/zh
Publication of WO2017113255A1 publication Critical patent/WO2017113255A1/zh

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/12—Synchronisation between the display unit and other units, e.g. other display units, video-disc players
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
    • G02B23/10—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors reflecting into the field of view additional indications, e.g. from collimator
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
    • G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
    • G02B2027/012—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility comprising devices for attenuating parasitic image effects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0006—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0018—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for preventing ghost images

Definitions

  • the present invention relates to the field of head mounted displays, and more particularly to head mounted display devices.
  • a Head Mounted Display refers to a display device that can be worn on the head.
  • the HMD typically uses a "near-eye optical system" to project a display source on the display screen to the user's eyes.
  • HMD is divided into immersive and transmissive. For immersive devices, in order to let the user completely in the display provided by the device, the contact with the real world is isolated.
  • the current common practice is the HMD external camera.
  • the user can switch the external camera to capture the external scene by switching the external camera as the display output source.
  • the external camera switching will produce a certain time delay and positional shift, which will result in a certain difference between the external scene and the actual scene displayed by the HMD, resulting in poor realism.
  • Embodiments of the present invention provide a head mounted display device that provides a solution for real viewing of an outside scene.
  • a first aspect of the embodiments of the present invention provides a head mounted display device including a housing and an optical lens, a telescope, an imaging mirror, and a display screen disposed in the housing, the housing further including a display window and a viewing window.
  • the telescope is disposed corresponding to the finder window, the optical lens and the telescope are disposed along a first optical axis, and the imaging lens assembly and the display screen are disposed along a second optical axis, wherein the display screen is The light is projected through the display mirror through the imaging mirror and the optical lens, or external light is projected through the display window and the telescope through the display window.
  • the light emitted by the display screen is projected through the display mirror and the optical lens through the display window to provide a display content for the user to view the display screen, or the external Light is projected through the viewing window and the telescope through the display window Body to provide a user to view the outside scene through the head mounted display device.
  • FIG. 1 is a schematic structural view showing the optical components of a head mounted display device according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of optical components of a head mounted display device according to another embodiment of the present invention.
  • FIG. 3 is a schematic diagram showing the principle of display content of a display screen of a head mounted display device according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram showing the principle of viewing an external scene of a head mounted display device according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of an optical component of a head mounted display device according to another embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of optical components of a head mounted display device according to another embodiment of the present invention.
  • Embodiments of the present invention provide a head mounted display device that provides a solution for real viewing of an outside scene.
  • the head mounted display device provided by the present invention includes a housing 1 and is placed thereon.
  • the optical lens 20, the telescope 30, the imaging lens assembly 50 and the display screen 60 in the housing 1 further include a display window 90 and a viewing window 100.
  • the telescope 30 is disposed corresponding to the viewing window 100, and the optical lens 20 and the telescope 30 are along
  • the first optical axis 70 is disposed, and the imaging lens assembly 50 and the display screen 60 are disposed along the second optical axis 80.
  • the light emitted by the display screen 60 is projected through the imaging mirror 50 and the optical lens 20 through the display window 90.
  • the two eyes of the user respectively correspond to the display window 90, that is, the light emitted by the display screen 60 is projected through the display window 90 to the eyes of the user through the imaging lens assembly 50 and the optical lens 20. Or the outside light is projected through the viewing window 100 and the telescope 30 through the display window 90, so that the user can view the outside scene.
  • FIG. 1 to FIG. 2 and FIG. 5-FIG. 6 is a schematic structural view showing the optical components of any optical system of the head mounted display device of the present invention.
  • the head mounted display device provided by the present invention further includes a shielding cover 40 covering the viewing window 100 and/or a protective lens 10 disposed on the display window 90.
  • the finder window 100 and the display window 90 may be through holes formed in the casing 1 so that light can enter and exit.
  • the shielding cover 40 is disposed at a position corresponding to the finder window 100 for viewing the display content of the display screen 60.
  • the shielding cover 40 is in a closed state.
  • the shielding cover 40 is made of an opaque material. The external light is blocked from entering the telescope 30, which makes it possible to have a better immersion effect when viewing the display content of the display screen 60.
  • the shadow cover 40 When it is necessary to view the outside scene, the shadow cover 40 is placed in an open state, that is, external light enters the telescope 30.
  • the protective lens 10 can be fixed to the display window 90, and the protective lens 10 can prevent outside dust and the like from entering the casing 1, affecting the optical component and its rendering effect.
  • the telescope 30 is detachably replaceable.
  • the telescope 30 can be disposed in the housing 1 through a snap structure.
  • the optical lens 20 is added in front of the optical lens 20.
  • the telescope 30 of a certain magnification is placed upside down, that is, the eyepiece 31 of the telescope 30 is disposed corresponding to the finder window 100, and external light enters through the eyepiece 31 of the telescope 30 and exits through the objective lens 32 of the telescope 30.
  • the inverted telescope 30 can reduce the object and have a large field of view. Therefore, adding a certain magnification to the front of the optical lens 20 to invert the telescope 30 can increase the viewing reality.
  • the angle of view of the environment Since the telescope 30 is detachable and replaceable, the user can replace the inverted telescopes of different magnifications according to the requirements, thereby improving the user experience.
  • the optical lens 20 is at 45° to the second optical axis 80.
  • the first optical axis 70 is at 90° to the second optical axis 80.
  • the optical lens 20 is a total reflection lens.
  • the viewfinder 100 is facing the display window 90 so that the user can view the field of view facing the eye.
  • the optical lens 20 is connected to the shutter 200.
  • the shutter 200 When the shutter 200 is in the pop-up state, the optical lens 20 is removed from the first optical axis 70, so that the external light incident through the telescope 30 can pass directly through the display window. 90 is projected for the user to watch.
  • the optical lens 20 moves into the first optical axis 70, so that the light emitted by the display screen 60 is projected to the display display window 90 through the reflection of the imaging mirror 50 and the optical lens 20, thereby projecting to the user. eye.
  • the shutter 200 can be connected to the controller of the head mounted display device, so that the controller acquires the operation of the user triggering the shutter 200 to rise and fall according to the input unit.
  • the input unit can be a physical button, a touchpad, etc.
  • the shutter 200 can also be directly connected to an operable component that leads to the exterior of the housing 1, such that the user can manually operate the operable component to drive the landing of the shutter 200. It should be understood that the present invention is only illustrative of the principles of the present invention and is not limited to the specific structural positions in the drawings.
  • the display screen 60 may be disposed at any position as long as the display screen 60 is issued according to a specific optical design.
  • the finder window 100 and the correspondingly disposed telescope 30 are not limited to the position of the display window 90, for example, disposed on the side of the casing 1, and the optical path is changed by a specific optical design to realize projection to the user's eyes through the display window 90. It is sufficient, for example, to use a reflective element to effect a change in the optical path to obtain the direction of the final exit.
  • the surface 21 of the optical lens 20 adjacent to the imaging mirror 50 is plated with a visible light total reflection film, and the surface 22 of the optical lens 20 remote from the imaging lens 50 is a frosted surface.
  • the visible light total reflection film is totally reflected in the visible light band of 380 nm to 780 nm.
  • the total reflection film may be an all-media reflection film or a metal reflection film.
  • the all-media reflective film is a film plated using a non-metallic compound material.
  • the metal reflective film is a film plated using a metal material.
  • the shielding cover 40 when the shielding cover 40 is in a closed state, that is, shielding external light from entering the telescope 30, the manner of viewing the display content of the display screen 60 is better. Immersive effect.
  • the display screen 60 When the display screen 60 is in the on state, the light emitted by the display screen 60 passes through the imaging lens assembly 50 and is reflected on the surface 21 of the optical lens 20 near the imaging lens assembly 50. Since the optical lens 20 is coated with visible light near the surface 21 of the imaging lens assembly 50.
  • the band is totally reflective, so that most of the light emitted by the display screen 60 is reflected by the optical lens 20 to the display window 90, and a very small portion of the remaining light is incident on the surface 22 of the optical lens 20 remote from the imaging lens 50 through the reflective film. Since the surface 22 of the optical lens 20 remote from the imaging mirror 50 is a frosted surface, the residual light is diffusely reflected on the surface 22 of the optical lens 20 remote from the imaging mirror 50, and specular reflection does not occur, thereby avoiding ghosting. .
  • the shielding cover 40 When the shielding cover 40 is in the open state and the display screen 60 is in the closed state, when the external light enters the optical lens 20 through the telescope 30, since the surface 22 of the optical lens 20 remote from the imaging mirror 50 is a frosted surface, the optical lens 20 is approached.
  • the surface 21 of the imaging lens assembly 50 is plated with a visible light-band total reflection film.
  • the head-mounted display device shown in FIG. 2 can move the optical lens 20 to the position shown in FIG. 4 through the shutter when viewing the external scene, or move the optical lens 20 to not be in the first optical axis.
  • the other positions of the 70 are such that the light that does not obstruct the outside is emitted through the display window 90, which is not limited by the present invention.
  • the optical lens 20 is a spectroscopic lens.
  • the surface 21 of the optical lens 20 adjacent to the imaging mirror 50 is plated with a 50% reflection 50% transmission of the visible light band
  • the surface 22 of the optical lens 20 remote from the imaging lens 50 is plated with a visible light absorption film.
  • the spectroscopic film in which 50% of the visible light band is reflected and transmitted at 50% is 50% reflection of 50% reflection in the visible light band of 380 nm to 780 nm when incident at an angle of 45 degrees.
  • the spectroscopic film in which the visible light band is 50% reflective and 50% transmitted is an all-media beam splitting film.
  • the shielding cover 40 when the shielding cover 40 is in the closed state and the display screen 60 is in the on state, the light emitted by the display screen 60 passes through the imaging lens assembly 50 and approaches the surface 21 of the imaging lens assembly 50 at the optical lens 20.
  • 50% of the light passes through the reflection of the spectroscopic film passing through the surface 21 of the optical lens into the human eye, and 50% of the light passes through the spectroscopic film of the surface 21 of the optical lens 20, and is incident from the air to the optical lens 20 to form a refraction due to
  • the surface 22 of the optical lens 20 is plated with an anti-reflection coating in the visible light band so that the remaining 50% of the light does not form a reflection on the surface 21 of the optical lens 20, but is transmitted from the surface 22 of the optical lens 20.
  • the cover 40 When the cover 40 is in the open state and the display 60 is in the closed state, When the external light passes through the telescope 30 and enters the optical lens 20, since the surface 21 of the optical lens 20 close to the imaging mirror 50 is plated with a 50% reflection of 50% transmission of the visible light film, the optical lens 20 is away from the imaging lens 50.
  • the surface is plated with an anti-reflection coating in the visible light band, so that 50% of the light entering the optical lens 20 passes through the first lens 10 and enters the human eye, so there is no need to remove the optical lens 20 from the first optical axis 70. Therefore, when the head-mounted display device shown in FIG. 5 views the outside scene, the cover cover 40 only needs to be opened, and the operation is simple.
  • the optical lens 20 is a polarization beam splitting prism.
  • the shielding cover 40 when the shielding cover 40 is in the closed state and the display screen 60 is in the on state, the light emitted by the display screen 60 passes through the imaging lens assembly 50 and is split into a vertical second optical axis at the optical lens 20.
  • the S light of 80 and a P light parallel to the second optical axis 80 the S light enters the human eye through the first lens 10, and the P light is transmitted through the optical lens 20.
  • the shielding cover 40 is in the open state and the display screen 60 is in the closed state, when ambient light passes through the telescope 30 and enters the optical lens 20, it is divided into a bundle of S1 light of the first optical axis 80 and a parallel first optical axis 80.
  • the P1 light, the P1 light enters the human eye through the first lens 10, and the S1 light is transmitted through the optical lens 20. There is therefore no need to move the optical lens 20 out of the first optical axis 70. Therefore, the head-mounted display device shown in FIG. 6 only needs to open the cover when viewing the external scene, and the operation is simple.
  • the shielding cover 40 when the shielding cover 40 is in the closed state and the display screen 60 is in the open state, the light emitted by the display screen 60 is projected through the imaging mirror 50 and the optical lens 20 through the display window 90.
  • the external viewfinder window 100, the telescope 30, and the optical lens 20 project the housing through the display window 90, or when the cover 30 is In the open state, when the display screen 60 is in the closed state and the optical lens 20 is in the removed state, the external viewfinder window 100 and the telescope 30 project the housing 1 through the display window 90.

Abstract

一种头戴式显示设备，包括壳体（1）以及置于壳体（1）内的光学镜片（20）、望远镜（30）、成像镜组（50）以及显示屏（60），所述壳体（1）还包括显示视窗（90）以及取景视窗（100），所述望远镜（30）对应所述取景视窗（100）设置，所述光学镜片（20）与所述望远镜（30）沿着第一光轴（70）配置，所述成像镜组（50）与所述显示屏（60）沿着第二光轴（80）配置，其中，所述显示屏（60）发出的光经所述成像镜组（50）以及所述光学镜片（20）通过所述显示视窗（90）投射出壳体（1），或外界的光经所述取景视窗（100）以及所述望远镜（30）通过所述显示视窗（90）投射出壳体（1），用户通过头戴式显示设备可真实观看外界景象。

Description

头戴式显示设备 技术领域
本发明涉及头戴式显示领域，尤其涉及头戴式显示设备。
背景技术
头戴式显示设备(Head Mounted Display，HMD)指的是可以戴在头上的显示设备。HMD一般使用“近眼光学系统”将显示屏幕上的显示源投射至用户的眼睛。HMD分为沉浸式和穿透式，对于沉浸式设备来说，为了让用户完全处于设备提供的显示中，隔离了与现实世界的接触。
为了解决沉浸式HMD隔离了与现实世界的接触的问题，目前通常的做法是HMD外置摄像头，用户可通过切换外置摄像头作为显示输出源，通过HMD显示摄像头捕获的外界景象。但是，外置摄像头切换会产生一定的时间延迟和位置偏移，进而导致通过HMD显示的外界景象和现实景象存在一定的差异，导致真实感较差。
发明内容
本发明实施例提供一种头戴式显示设备，提供一种可真实观看外界景象的方案。
本发明实施例第一方面提供一种头戴式显示设备，包括壳体以及置于壳体内的光学镜片、望远镜、成像镜组以及显示屏，所述壳体还包括显示视窗以及取景视窗，所述望远镜对应所述取景视窗设置，所述光学镜片与所述望远镜沿着第一光轴配置，所述成像镜组与所述显示屏沿着第二光轴配置，其中，所述显示屏发出的光经所述成像镜组以及所述光学镜片通过所述显示视窗投射出壳体，或外界的光经所述取景视窗以及所述望远镜通过所述显示视窗投射出壳体。
本发明公开的头戴式显示设备，显示屏发出的光经所述成像镜组以及所述光学镜片通过所述显示视窗投射出壳体，以提供用户观看显示屏的显示内容，或所述外界的光经所述取景视窗以及所述望远镜通过所述显示视窗投射出壳 体，以提供用户可通过该头戴式显示设备观看外界景象。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明一个实施例的头戴式显示设备的光学元件组成结构示意图；
图2为本发明另一个实施例的头戴式显示设备的光学元件组成结构示意图；
图3为本发明实施例的头戴式显示设备的显示屏显示内容的原理示意图；
图4为本发明实施例的头戴式显示设备的观看外界景象的原理示意图；
图5为本发明另一个实施例的头戴式显示设备的光学元件组成结构示意图；
图6为本发明另一个实施例的头戴式显示设备的光学元件组成结构示意图。
具体实施方式
本发明实施例提供一种头戴式显示设备，提供一种可真实观看外界景象的方案。
为了使本技术领域的人员更好地理解本发明方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分的实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本发明保护的范围。
以下分别进行详细说明。
本发明的说明书和权利要求书及所述附图中的术语“第一”、“第二”、“第三”和“第四”等是用于区别不同对象，而不是用于描述特定顺序。
请一并参见图1-图6，本发明提供的头戴式显示设备包括壳体1以及置于 壳体1内的光学镜片20、望远镜30、成像镜组50以及显示屏60，壳体1还包括显示视窗90以及取景视窗100，望远镜30对应取景视窗100设置，光学镜片20与望远镜30沿着第一光轴70配置，成像镜组50与显示屏60沿着第二光轴80配置，其中，显示屏60发出的光经成像镜组50以及光学镜片20通过显示视窗90投射出壳体，当用户佩戴该头戴式显示设备后，用户的两只眼睛分别对应到显示视窗90，即显示屏60发出的光经成像镜组50以及光学镜片20通过显示视窗90投射至用户眼睛。或外界的光经取景视窗100以及望远镜30通过显示视窗90投射出壳体1，从而用户可以观看到外界景象。
需要说明的是，本发明公开的头戴式显示设备包括两个光学系统，一个光学系统对应左眼，另一光学系统对应右眼，且两个光学系统相对应，图1-图2和图5-图6为本发明公开的头戴显示设备的任意一个光学系统的光学元件组成结构示意图。
可选的，本发明提供的头戴式显示设备还包括遮盖于取景视窗100的遮蔽盖40和/或设置于显示视窗90的保护镜片10。本发明实施例中，取景视窗100及显示视窗90可以为壳体1上开设的通孔，使得光线可以进出。遮蔽盖40活动设置于壳体1对应该取景视窗100的位置，用于在观看显示屏60的显示内容时，遮蔽盖40处于关闭状态，具体的，该遮蔽盖40采用不透光材质，即遮挡外界光线进入望远镜30，该方式下可以使得观看显示屏60的显示内容时，有更好的沉浸效果。当需要观看外界景象时，使得遮蔽盖40处于打开状态，即使得外界光线进入望远镜30。保护镜片10可以固设于显示视窗90，保护镜片10可以防止外界尘埃等进入壳体1内，影响光学元件及其呈现效果。
可选的，望远镜30可拆卸更换。具体的，望远镜30可以通过卡扣结构设置于壳体1内。
具体实现中，由于设置于壳体1的取景视窗100有一定的宽度，人眼直接采用该视窗观看现实环境，视野较小，因此为了增大观看现实环境的视野范围，在光学镜片20前面加一定倍率的望远镜30且将该望远镜30倒置设置，即，望远镜30的目镜31对应取景视窗100设置，外界的光通过望远镜30的目镜31进入并通过望远镜30的物镜32出射。倒置望远镜30可以将物体缩小，视野范围大，因此在光学镜片20前面加一定倍率倒置望远镜30可增大观看现实 环境的视场角。由于望远镜30可拆卸更换，用户可根据需求更换不同倍率的倒置望远镜，进而提升用户体验。
可选的，光学镜片20与第二光轴80成45°。
可选的，第一光轴70与第二光轴80成90°。
可选的，光学镜片20为全反射镜片。
该实施例中，取景视窗100正对于显示视窗90，使得用户可以观看到眼睛正对的视野。较优的，该光学镜片20与光闸200连接，当光闸200处于弹起状态时，光学镜片20从第一光轴70移除，使得经望远镜30入射的外界的光可以直接通过显示视窗90投射出，以供用户观看。当光闸200处于落下状态时，光学镜片20移入第一光轴70，使得显示屏60发出的光经成像镜组50以及光学镜片20的反射投射至显示显示视窗90的方向，从而投射至用户眼睛。其中，光闸200可以连接于头戴式显示设备的控制器，从而该控制器根据输入单元获取用户触发光闸200起落的操作，例如该输入单元可以为物理按键，触控板等，实现对光闸200起落的电控。光闸200也可以直接连接于一通向壳体1外部的可操作部件，使得用户可以手动操作该可操作部件来带动该光闸200的起落。可以理解的是，本发明附图仅为示意本发明原理，并不限于附图中的具体结构位置，显示屏60可以设置于任意位置，只要根据具体的光学设计，将该显示屏60发出的光按设计光路通过显示视窗90投射至用户眼睛即可。同理的，取景视窗100以及对应设置的望远镜30也不限于正对于显示视窗90的位置，例如设置于壳体1的侧边，通过具体的光学设计改变光路实现通过显示视窗90投射至用户眼睛即可，例如采用反射元件实现光路的改变，以得到最终出射的方向。
可选的，光学镜片20的靠近成像镜组50的表面21镀有可见光波段全反射膜，光学镜片20的远离成像镜组50的表面22为磨砂表面。
其中，可见光波段全反射膜为对可见光波段380nm～780nm全反射。全反射膜可为全介质反射膜或金属反射膜。全介质反射膜为使用非金属化合物材料镀制的薄膜。金属反射膜为使用金属材料镀制的薄膜。
举例来说，如图2-图4所示，当遮蔽盖40处于关闭状态，即遮挡外界光线进入望远镜30，该方式下可以使得观看显示屏60的显示内容时，有更好的 沉浸效果。显示屏60处于开启状态时，显示屏60发出的光经过成像镜组50后在光学镜片20靠近成像镜组50的表面21发生反射，由于光学镜片20靠近成像镜组50的表面21镀有可见光波段全反射膜，因此显示屏60发出的光绝大部分光经光学镜片20反射到显示视窗90，剩余极少数的一部分光线通过该反射膜入射到光学镜片20的远离成像镜组50的表面22，由于光学镜片20的远离成像镜组50的表面22为磨砂表面，因此剩余光线在光学镜片20的远离成像镜组50的表面22形成漫反射，不会发生镜面反射，进而避免出现重影现象。当遮蔽盖40处于开启状态，显示屏60处于关闭状态时，当外界的光经望远镜30进入光学镜片20，由于光学镜片20的远离成像镜组50的表面22为磨砂表面，光学镜片20的靠近成像镜组50的表面21镀有可见光波段全反射膜，外界的光经取景视窗100以及望远镜30进入光学镜片20的表面22时发生漫反射，使得外界的光不能通过显示视窗90投射出壳体1，因此，图2所示的头戴式显示设备在观看外界景象时，可通过光闸将光学镜片20移到图4所示的位置，或是光学镜片20移到不处于第一光轴70的其他位置，使得不阻碍外界的光通过显示视窗90出射即可，本发明不做限定。
可选的，光学镜片20为分光镜片。
可选的，光学镜片20的靠近成像镜组50的表面21镀有可见光波段50％反射50％透射的分光膜，光学镜片20的远离成像镜组50的表面22镀有可见光波段增透膜。
其中，可见光波段50％反射50％透射的分光膜为在45度角入射时，对可见光波段380nm～780nm 50％反射50％透射。可见光波段50％反射50％透射的分光膜为全介质分光膜。
举例来说，如图5所示，当遮蔽盖40处于关闭状态，显示屏60处于开启状态时，显示屏60发出的光经过成像镜组50后在光学镜片20靠近成像镜组50的表面21有50％的光通过了通过光学镜片的表面21的分光膜的反射进入人眼，剩下50％的光通过光学镜片20的表面21的分光膜，从空气入射到光学镜片20形成折射，由于光学镜片20的表面22镀有可见光波段增透膜，所以剩余的50％光线不会在光学镜片20的表面21形成反射，而是从光学镜片20的表面22透射出去。当遮蔽盖40处于开启状态，显示屏60处于关闭状态时， 当外界的光经过通过望远镜30进入光学镜片20，由于光学镜片20的靠近成像镜组50的表面21镀有可见光波段50％反射50％透射的分光膜，光学镜片20的远离成像镜组50的表面镀有可见光波段增透膜，因此进入光学镜片20的光有50％的光经过第一镜片10进入人眼，因此不需要将光学镜片20从第一光轴70移除。因此图5所示的头戴式显示设备在观看外界景象时，只需打开遮蔽盖40即可，操作简单。
可选的，光学镜片20为偏振分光棱镜。
举例来说，如图6所示，当遮蔽盖40处于关闭状态，显示屏60处于开启状态时，显示屏60发出的光经过成像镜组50后在光学镜片20分成一束垂直第二光轴80的S光和一束平行第二光轴80的P光，S光经过第一镜片10进入人眼，P光通过光学镜片20透射出去。当遮蔽盖40处于开启状态，显示屏60处于关闭状态时，当外界的光经过通过望远镜30进入光学镜片20，分成一束垂直第一光轴80的S1光和一束平行第一光轴80的P1光，P1光经过第一镜片10进入人眼，S1光通过光学镜片20透射出去。因此不需要将光学镜片20移出第一光轴70。因此图6所示的头戴式显示设备在观看外界景象时，只需打开遮蔽盖即可，操作简单。
可以看出，本发明公开的头戴式显示设备，当遮蔽盖40处于关闭状态，显示屏60处于开启状态时，显示屏60发出的光通过成像镜组50、光学镜片20通过显示视窗90投射出壳体1，当遮蔽盖40处于打开状态，显示屏60处于关闭状态时，外界的经取景视窗100、望远镜30、光学镜片20通过显示视窗90投射出壳体，或者，当遮蔽盖30处于打开状态，显示屏60处于关闭状态且光学镜片20处于移除状态时，外界的经取景视窗100以及望远镜30通过显示视窗90投射出壳体1。可见，当用户想要观看外界景象时，只需打开遮蔽盖40、关闭显示器60，或者只需打开遮蔽盖40、关闭显示器60、移除光学镜片20即可观看外界景象，与现有技术外置摄像头相比，从虚拟图像显示切换到现实图像显示时，降低了成像显示和现实显示切换的时间差，进而提升真实感。
以上所述，以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理 解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (10)

  1. 一种头戴式显示设备，其特征在于，包括壳体以及置于壳体内的光学镜片、望远镜、成像镜组以及显示屏，所述壳体还包括显示视窗以及取景视窗，所述望远镜对应所述取景视窗设置，所述光学镜片与所述望远镜沿着第一光轴配置，所述成像镜组与所述显示屏沿着第二光轴配置，其中，所述显示屏发出的光经所述成像镜组以及所述光学镜片通过所述显示视窗投射出壳体，或外界的光经所述取景视窗以及所述望远镜通过所述显示视窗投射出壳体。
  2. 根据权利要求1所述的头戴式显示设备，其特征在于，所述光学镜片为全反射镜片。
  3. 根据权利要求2所述的头戴式显示设备，其特征在于，所述光学镜片与光闸连接，当所述光闸处于弹起状态时，所述光学镜片从所述第一光轴移除，当所述光闸处于落下状态时，所述光学镜片移入所述第一光轴。
  4. 根据权利要求2或3所述的头戴式显示设备，其特征在于，所述光学镜片的靠近所述成像镜组的表面镀有可见光波段全反射膜，所述光学镜片的远离所述成像镜组的表面为磨砂表面。
  5. 根据权利要求1所述的头戴式显示设备，其特征在于，所述光学镜片为分光镜片。
  6. 根据权利要求5所述的头戴式显示设备，其特征在于，所述光学镜片的靠近所述成像镜组的表面镀有可见光波段50％反射50％透射的分光膜，所述光学镜片的远离所述成像镜组的表面镀有可见光波段增透膜。
  7. 根据权利要求1-6任一项所述的头戴式显示设备，其特征在于，所述光学镜片与所述第二光轴成45°。
  8. 根据权利要求1-7任一项所述的头戴式显示设备，其特征在于，所述第一光轴与所述第二光轴成90°。
  9. 根据权利要求1-8任一项所述的头戴式显示设备，其特征在于，所述望远镜的目镜对应所述取景视窗设置，所述外界的光通过所述望远镜的目镜进入并通过所述望远镜的物镜出射。
  10. 根据权利要求1所述的头戴式显示设备，其特征在于，还包括遮盖于所述取景视窗的遮蔽盖和/或设置于所述显示视窗的保护镜片。
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