CN207008193U - A kind of light source orientation device - Google Patents

Abstract

It the utility model is related to AR system information tracer techniques field, especially a kind of light source orientation device and design method.It includes lens, lens are to make 360 ° of rotational symmetry structure bodies formed after rotating with a vertical axis, the axial cross section of lens is shaped as the parabola shaped of upper shed, the opening surface of lens is the plane perpendicular with vertical axis, offers the rounded channels using vertical axis as rotation axis on the face of summit, and one is further opened with lens and is communicated with rounded channels and the free form surface groove using vertical axis as rotation axis.When the given position being placed in the incidence point for the optical imagery being transmitted to via relay optical system or optical combiner in rounded channels, the refraction effect formed using rounded channels and free form surface groove and paraboloidal total reflection effect, the light that optical imagery can be enable to be sent is emitted in a manner of being approximately parallel to optical axis, so as to be clearly imaged on human eye retina.

Description

A kind of light source orientation device

Technical field

AR system information tracer techniques field is the utility model is related to, it is especially a kind of to be applied to Helmet Mounted Display Light source orientation device in colimated light system.

Background technology

Augmented reality (Augmented Reality, abbreviation AR) is a kind of by real world information and virtual world Information carries out " seamless " integrated new technology, and its real environment is (i.e.：In certain time of real world, spatial dimension very The entity information that difficulty is experienced, such as visual information, sound, taste, tactile) and virtual object (such as 3D models, video, figure As etc.) be added in real time in same picture or space, to be perceived by human sensory, so as to reach exceeding reality Sensory experience.AR technologies be widely used in the developments of such as sophisticated weapons and aircraft and exploitation, the visualization of data model, The fields such as virtual training, amusement and art, and because it has the characteristic that can carry out strengthening display output to true environment, In such as medical research and dissection training, precision instrument manufacture and maintenance, military aircraft navigation, engineering design and tele-robotic The fields such as control also have obvious advantage.

Wherein, for Helmet Mounted Display as one of critical component in augmented reality system, its main function is intuitively will The image that virtual scene is formed after being merged with external world scene is shown to user；At present, Helmet Mounted Display mainly by The part of image source, relay optical system, colimated light system and optical combiner etc. four is formed, and display is by virtual reality work in image source Make the image that station is sent, optical imagery is passed to follow-up optical system (i.e. by relay optical system：Optical combiner and collimation System), light collimation is sent into human eye by colimated light system for class directional light, and is imaged on human eye retina.Existing collimation system System causes Helmet Mounted Display not obtain more clearly outside because the transmitance of light beam is relatively low, the controlling of light beam is poor The world and scene information caused by inside.

Utility model content

For above-mentioned the shortcomings of the prior art, the purpose of this utility model is that the helmet can be applied to by providing one kind Light source orientation device in the colimated light system of display.

To achieve these goals, the utility model adopts the following technical scheme that：

A kind of light source orientation device, it includes lens, and the lens are formed after making 360 ° of rotations with a vertical axis Rotational symmetry structure body, the axial cross section of the lens is shaped as the parabola shaped of upper shed, and the opening surface of the lens is With vertical axis perpendicular plane, offer the rounded channels using vertical axis as rotation axis, the lens on the face of summit One is inside further opened with to communicate with rounded channels and the free form surface groove using vertical axis as rotation axis；The opening surface of the lens is made It is plane refraction mirror, side wall as parabola completely reflecting mirror, the groove face of the rounded channels is as refraction at spherical surface mirror, the freedom The groove face of curved surface groove is as free form surface refracting telescope.

Wherein, preferred scheme is：The sphere center position of the rounded channels is as optical imagery incidence set-point.

Wherein, preferred scheme is：The radius of the light source is not more than 1mm.

Wherein, preferred scheme is：The lens are made up of acrylic material.

As a result of such scheme, when the optical imagery being transmitted to via relay optical system or optical combiner Incidence point when being placed in the given position in rounded channels, the refraction effect formed using rounded channels and free form surface groove and throwing The total reflection effect of object plane, can enable the light that optical imagery is sent be emitted in a manner of being approximately parallel to optical axis, so as to Clearly it is imaged on human eye retina；Simultaneously as free form surface is arranged at the inside of lens, largely protect The integrality of the face type of free form surface and the transmitance for being advantageous to improve light beam.

Brief description of the drawings

Fig. 1 is the light channel structure figure of the utility model embodiment.

Embodiment

Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing, but the utility model can be by right It is required that the multitude of different ways for limiting and covering is implemented.

As shown in figure 1, a kind of light source orientation device that the present embodiment provides, it includes being made up of preferable acrylic material Lens, lens are to make the rotational symmetry structure bodies that are formed after 360 ° of rotations, the axial cross section shape of lens with a vertical axis Shape is parabola shaped for upper shed, and the opening surface of lens is that the plane perpendicular with vertical axis, summit offer one on face Rounded channels a using vertical axis as rotation axis, one is further opened with lens and is communicated with rounded channels a and using vertical axis as rotation The free form surface groove b of shaft axis；Wherein, using the opening surface of lens as plane refraction mirror 1, side wall be used as parabola total reflection Mirror 2, rounded channels a groove face is as refraction at spherical surface mirror 3, and free form surface groove b groove face is as free form surface refracting telescope 4.It can be formed All light channel structures as shown in Figure 1 are (i.e.：Dotted line c is the optical axis of light source, solid line d is the emitting light path of light, solid line e is freely Curved surface groove b and rounded channels a line of demarcation), when the optical imagery being transmitted to via relay optical system or optical combiner Incidence point (for ease of understanding, light source can be considered as) given position for being placed in rounded channels a when, utilize refraction at spherical surface mirror 3 and the total reflection effect of the refraction effect that is formed of free form surface refracting telescope 4 and parabola completely reflecting mirror 2, optical picture can be made The light that picture is sent can be emitted in a manner of being approximately parallel to optical axis, and then light is entered in a manner of class directional light It is mapped on the retina of human eye and clearly image is presented；Simultaneously as free form surface is arranged at the inside of lens, in very great Cheng The integrality of the face type of free form surface is protected on degree, is advantageous to improve the transmitance of light beam and reduces the loss of light beam.

, can be using rounded channels b sphere center position as optical imagery incidence set-point, so as to realize as a preferred scheme The paraboloidal focus of lens and the focus of sphere it can be seen from paraboloidal geometric properties, reach with overlapping via focus Paraboloidal light beam is emitted parallel to optical axis；And from the optical property of refraction at spherical surface mirror 3, via the light of centre of sphere arrival sphere Line will not change the direction of propagation.When light emitting anger is less than the angle of optical axis and line of demarcation, by the light that light source is sent by freely bent After face refracting telescope 4, the emergent light of formation is parallel with optical axis, and when light emitting anger is more than the angle of optical axis and line of demarcation, light source is sent Light after refraction at spherical surface mirror 3, do not change its route of transmission, reach at parabola completely reflecting mirror 2, occur total reflection effect, Its reflected light is still emitted parallel to optical axis from plane refraction mirror 1.

To ensure the optical efficiency of whole collimating mirror, process is actually detected, and the radius of light source is desirably no more than 1mm.

Preferred embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model, Every equivalent structure made using the utility model specification and accompanying drawing content or equivalent flow conversion, or directly or indirectly fortune Used in other related technical areas, similarly it is included in scope of patent protection of the present utility model.

Claims (4)

1. A kind of 1. light source orientation device, it is characterised in that：It includes lens, and the lens are to make 360 ° of rotations with a vertical axis The rotational symmetry structure body formed afterwards, the axial cross section of the lens are shaped as the parabola shaped of upper shed, the lens Opening surface is the plane perpendicular with vertical axis, offers the rounded channels using vertical axis as rotation axis on the face of summit, One is further opened with the lens to communicate with rounded channels and the free form surface groove using vertical axis as rotation axis；The lens Opening surface as plane refraction mirror, side wall as parabola completely reflecting mirror, the groove faces of the rounded channels as refraction at spherical surface mirror, The groove face of the free form surface groove is as free form surface refracting telescope.
2. A kind of 2. light source orientation device as claimed in claim 1, it is characterised in that：The sphere center position of the rounded channels is as light Learn image incidence set-point.
3. A kind of 3. light source orientation device as claimed in claim 2, it is characterised in that：The radius of the light source is not more than 1mm.
4. A kind of 4. light source orientation device as claimed in claim 1, it is characterised in that：The lens are made up of acrylic material.