TW201643500A - Portable projection device - Google Patents

Abstract

A projection apparatus includes a first optics system, a lens barrel, a reflective device, and a second optics system. The first optics system has a tilt common optics axis and at least a non-round optics lens. The first optics system is put into the lens barrel with the non-round shape correspond to the non-round optics lens. The reflective device has a reflective surface that contacts with the tilt common optics axis to reflect an image light to the second reflective surface of the second optics system.

Description

Portable projector

The present invention relates to a small projection device, and more particularly to a portable projection device.

Short-throw projectors, especially ultra-short-throw projectors, can project large images in a limited space length, which is important for the use of modern space. The ultra-short-focus projection optical system generally includes an image forming component (such as a DMD or an LCD), an optical system, and a mirror group, so that light is transmitted through the image forming component to form image light, and then through the optical system and the mirror group. It is processed and reflected to project a large picture on the screen in a limited space.

Although the ultra-short-throw projection optical system makes it possible to use even in a narrow office or the like, its volume is still too large and has a certain weight and is not suitable for carrying around. Therefore, how to miniaturize the ultra-short-focus projection optical system to facilitate carry-on has become one of the important topics. In addition to optical design, the mechanical design of the projector is also very important.

The above described features and advantages of the invention will be apparent from the following description.

The invention provides a projection device and an adjustment mechanism of an optical element.

An embodiment of the present invention provides a projection apparatus including a first optical system having a first optical axis inclined with respect to a horizontal plane and at least one non-circular optical lens; a lens barrel accommodating the first optical system, which has a non-circular shape member corresponding to at least one non-circular optical lens; a reflective member having a first reflective surface such that an axis of the first optical axis is in contact with the first reflective surface; and a second having a second reflective surface A second optical system that accepts image light from a first reflective surface.

In one embodiment, the first optical system has a front group optical lens assembly and a rear group optical lens assembly, at least one non-spherical optical lens being located in the front group optical lens assembly.

In one embodiment, the focusing mechanism can move at least one of the front group optical lens assemblies.

In one embodiment, the reflective element has an adjustment mechanism that utilizes a plurality of adjustment screws to tilt the reflective element at least up and down or left and right.

In an embodiment, the second optical system has an adjustment mechanism that tilts the second optical system at least up and down or left and right by using a plurality of adjustment screws.

In an embodiment, the plurality of long holes corresponding to the plurality of adjusting screws are arranged to vertically translate the optical element up and down.

An embodiment of the present invention provides a projection apparatus including a first mirror group including a plurality of trimmed circular optical lenses, and a first optical axis inclined with respect to a plane of the housing; and a receiving mechanism having a corresponding correspondence a containment housing for a trimmed circular lens; a mirror that receives image light from the first mirror group; and a concave mirror that accepts image light from the mirror.

An embodiment of the present invention provides an adjustment mechanism for an optical component, including a plurality of adjustment screws on opposite sides of the optical component, and a plurality of springs corresponding to the adjustment screws and sleeved thereon, when located on opposite sides Part of the adjustment screw on one side is relatively locked, and the adjustment screw on the other side of the opposite sides For relaxation, the optical element can be tilted to one side.

In one embodiment, a plurality of long holes corresponding to the one-to-one correspondence with the adjusting screw enable the optical element to translate up and down.

In an embodiment, the optical element has a reflective surface.

10‧‧‧Projection optics

11‧‧‧First optical system

12‧‧‧planar mirror

13‧‧‧Second optical system

80‧‧‧Image forming components

90‧‧‧ screen

100‧‧‧Portable Projector

110‧‧‧Huangguang Module

120‧‧‧heating mechanism

130‧‧‧First optical system

132‧‧‧First optical system housing

140‧‧‧reflecting elements

150‧‧‧Second optical system

160‧‧‧focus wheel

170‧‧‧Shell

180‧‧‧fan

1310‧‧‧ Rear group optical lens assembly

1312‧‧‧Adjust the groove

1314‧‧‧Sheet adjustment hole

1316‧‧‧ housing fixing hole

1320‧‧‧Pre-group optical lens assembly

1322‧‧‧Semicircular cam

1324, 1501‧‧‧ long adjustment holes

1326‧‧‧Latch

1402, 1404, 1406‧‧‧reflecting element adjustment screws

1403, 1405, 1407‧‧ spring

1502, 1504, 1506, 1508‧‧‧ second optical system adjustment screw

200, 300‧‧‧ projection optical system

201, 301‧‧‧ optical axis

202‧‧‧Image Processing Components

204‧‧‧ total reflection

210, 310‧‧‧refracting unit

212‧‧‧First lens group

214‧‧‧second lens group

220, 320‧‧‧reflection unit

222, 322, 324‧‧ ‧ reflector

L1-L14‧‧ lens

S1-S26‧‧‧ surface

I1, I2‧‧‧ rays

Figure 1 is a schematic view of a projection optical system

2 is a top plan view showing the internal combination of a portable projection device according to an embodiment of the invention.

3 is a perspective view of a first optical system according to an embodiment of the invention.

4 is a perspective view of a first optical system housing according to an embodiment of the invention.

FIG. 5 is a perspective view of a front group optical lens assembly in a first optical system according to an embodiment of the invention.

6 is a perspective view of a reflecting element adjusting mechanism according to an embodiment of the invention.

FIG. 7 is a perspective view showing an adjustment mechanism of a removal adjusting screw of a reflective member according to an embodiment of the invention.

FIG. 8 is a perspective view of a second optical system adjustment mechanism according to an embodiment of the invention.

FIG. 9 is a schematic diagram of a projection optical system according to an embodiment of the present invention.

10 and 11 are schematic views of a refractive unit according to an embodiment of the present invention.

Figure 12 is a schematic illustration of a projection optical system in accordance with an embodiment of the present invention.

13 to 15 show optical simulation results of the lens assembly of the projection optical system of Fig. 9, wherein Fig. 13 is a lateral chromatic aberration diagram, and Figs. 14 and 15 are optical transmissions. Function graph.

The foregoing and other objects, features, and advantages of the invention will be apparent from the Detailed Description The directional terms mentioned in the following embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only directions referring to the additional schema. Therefore, the directional terminology used is for the purpose of illustration and not limitation.

FIG. 1 is a schematic view illustrating a projection optical system. In the coordinate system of Fig. 1, the symbol X represents the long axis direction of the screen, the symbol Z represents the short axis direction of the screen, and the symbol Y represents the normal direction of the screen. Referring to FIG. 1, the projection optical device 10 includes a first optical system 11, a planar mirror 12, a second optical system 13, and an image forming element 80. In projection optics 10, first optical system 11 is comprised of at least one refractive optical lens system having the same optical axis, positive power. The plane mirror 12 is a mirror that changes the path of light from the first optical system 11 to the second optical system 13. The second optical system 13 includes at least one optical mirror system of positive power. The image light emitted from the image forming element 80 is incident on the first optical system 11, wherein the image forming element is a digital micro mirror element (DMD), and the image light passes through the second lens after passing through the first optical system 11 via the plane mirror 12 System 13 reflects to be projected onto screen 90.

In the following, a description will be given of the embodiments of the present invention, in which the same elements will be described with the same reference numerals. Please refer to FIG. 2 , which is a schematic top view of an internal combination of a portable ultra-short focus (may be, but not limited to, a portable or ultra-short focus) projection device 100 according to an embodiment of the invention. The portable ultra short throwing projection device 100 includes a light source (not shown), a light combining module 110, a heat dissipating mechanism 120, an image forming component (located under the focusing wheel 160, not shown), and a first light. The system 130, the reflective element 140, the second optical system 150, the focus wheel 160, and the housing 170. The light source is, for example, a light emitting diode (LED), a light bulb or a laser, and in one embodiment of the invention is a light source using red, blue and green three color LEDs. In the projection optical device, a high-power LED light source is generally used. Therefore, it is necessary to cooperate with the design of the heat dissipation mechanism 120 to efficiently carry away heat, thereby avoiding affecting the optical quality of the projected image. The color light emitted by the red, blue and green three-color LEDs is mixed into white light through the light combining module 110 composed of some optical elements, and the white light forms image light through the image forming elements. The image forming element such as a digital micro mirror element (DMD), a liquid crystal panel (LCD) or a liquid crystal overlay panel (LCOS), in one embodiment of the invention, uses a digital micro mirror element (DMD). The first optical system 130 is a positive power optical system including a plurality of refractive optical lenses having the same optical axis. The reflective element 140, such as a planar mirror, a spherical mirror, an aspheric mirror or a mirror, is used to vary the optical path from the first optical system 130 to the second optical system 150, in one embodiment of the invention using planar reflection mirror. The second optical system 150 is an optical system comprising a concave mirror including positive power, which may also be a convex mirror, a plane mirror, a spherical mirror, an aspheric mirror or a plurality of optical systems. An optical system consisting of mirrors. The focus wheel 160 is used to adjust the image projected onto the screen, and the housing 170 can cover all components to prevent dust from entering and affecting image quality.

Since the ultra-short-throw projector is much larger than the general projector, the precision of the required optical components is relatively high, thereby ensuring the optical quality and achieving the magnification and quality requirements required for the design. In particular, in order to achieve the correct light projection path required by the portable projection device, a portable projection device according to an embodiment of the present invention adjusts related optical components by using a plurality of adjustment mechanisms (for example, the first optical system, the reflective component, and the Two optical systems, etc.) to achieve the optical quality of the projected image.

Please refer to FIG. 3, FIG. 4 and FIG. 5, which are respectively implemented by the present invention. A perspective view of the first optical system 130, the first optical system housing 132, and the front group optical lens assembly 1320 is shown in a portable projection device. The first optical system 130 of one embodiment of the present invention can be divided into a rear group optical lens assembly 1310 and a front group optical lens assembly 1320. The rear group optical lens assembly 1310 includes an adjustment groove 1312 extending into the housing adjustment hole 1314 to the adjustment groove 1312 by an adjustment tool such as a long rod (not shown), and the rear group optical lens assembly is driven by the adjustment groove 1312. When the 1310 is moved to the desired position, the screw (not shown) is locked into the housing fixing hole 1316, and the adjustment operation of the rear group optical lens assembly 1310 during the manufacturing process is completed.

The projection screen size set by one embodiment of the present invention can be from 40 吋 to 100 吋, so that the user can use the rotation of the focus wheel 160 to make the image projected on the screen clearer. The tilting semi-circular cam (cam) 1322 is rotated by the focus wheel 160, and then the semi-circular cam 1322 drives the pin 1326 located in the elongated adjustment hole 1324 to move back and forth, so that the front group optical lens can be made. A portion of the lens of assembly 1320 is straight in and out. It is to be noted that, in order to prevent the user from interfering with the image light incident from the second optical system 150 to the screen when adjusting the image sharpness, an embodiment of the present invention sets the focus wheel 160 away from the second optical One end of the system 150 effectively prevents the occurrence of interference phenomena.

In addition, limited by the short and light requirements of the portable projection device and to avoid interference with the image light incident from the second optical system 150 to the screen, an embodiment of the present invention uses (1) the front group optical lens The upper portion of the assembly 1320 is cut away, and (2) the optical axis of the first optical system 130 is inclined to the bottom level of the housing. Since the image light mainly propagates through the lower portion of the front group optical lens assembly 1320 during the optical design, the upper portion is cut off without affecting the optical quality of the projected image. However, it should be noted that if the front group optical lens assembly has too many cut-out portions, the optical propagation effective area is reduced, which affects the optical quality of the projected image. If the front group optical lens assembly has too few cut portions, except that it may be caused and removed from the second optical system 150 In addition to the interference of the image light hitting the screen, the outer casing may not be in close contact and cannot meet the customer's size requirements. Therefore, in order to accurately control the upper portion of the front group optical lens assembly 1320, the above problems can be avoided. In still another embodiment of the invention, the angle between the optical axis of the first optical system 130 and the horizontal plane is about 9 degrees.

The front group optical lens assembly 1320 is preferably a rounded circle, and in this embodiment, in particular, an upper rounded optical lens. Further, the present embodiment includes a lens barrel accommodating the first optical system, which also has a trimming circular styling member corresponding to the non-spherical optical lens.

Please refer to FIG. 6 and FIG. 7 , which are perspective views of an adjustment mechanism for displaying the reflective element 140 and an adjustment mechanism for removing the adjustment screw in a portable projection device according to an embodiment of the invention. Since the optical axis of the first optical system 130 of one embodiment of the present invention is inclined to the horizontal plane of the bottom of the housing, the reflective element 140 must be inclined toward the optical axis of the first optical system 130 such that the normal of the reflective element 140 is parallel to the The optical axis of an optical system 130. Furthermore, the reflective element 140 must also cause the image light incident from the first optical system 130 to be horizontally folded to the second optical system 150. To meet the foregoing needs, the adjustment mechanism of the reflective element 140 adjusts the two directions by three reflective element adjustment screws 1402, 1404, 1406. When the lower two reflective element adjustment screws 1404, 1406 are locked into the reflective element adjustment mechanism, the reflective element 140 can be tilted toward the optical axis of the first optical system 130. When the two reflective element adjustment screws 1402, 1404 on the side are locked into the reflective element adjustment mechanism, the angle of the reflective element 140 facing the second optical system 150 can be adjusted. When the reflection element adjustment screws 1402, 1404, 1406 are loosened, the reflection element 140 can be pushed away by the elastic force of the springs 1403, 1405, 1407. By using this principle of action, after the reflective element adjusting screws 1402, 1404, 1406 are locked in position and fixed, the adjustment operation of the reflecting element 140 during the manufacturing process is completed.

In an embodiment of the present invention, one or more fans 180 may be added in the vicinity of the heat dissipation mechanism 120. As shown in FIG. 6, the rotation of the fan 180 drives the airflow, which can more efficiently generate the LED light source. The heat is removed to avoid affecting the optical quality of the projected image.

Please refer to FIG. 8 , which is a perspective view of a second optical system adjustment mechanism according to an embodiment of the present invention. The second optical system 150 can be tilted up and down by the addition of spacers (not shown) to the two second optical system adjustment screws 1502, 1506 below, when the screws are locked into the second optical system adjustment mechanism. Further, the second optical system adjusting screws 1502 and 1504 are added to the side by using a spacer (not shown). When the screw is locked into the second optical system adjusting mechanism, the second optical system 150 can be tilted left and right. Furthermore, the second optical system 150 can be moved up and down by using the second optical system adjusting screw 1502 and the elongated adjusting hole 1501 (the other second optical system adjusting screws also have matching elongated adjusting holes). In addition, the uniform force of the springs (not labeled) on the screws 1502, 1504, 1506, 1508 can be adjusted by the four second optical systems to cushion manufacturing tolerances and reduce image quality sensitivity.

The first optical system, the reflective element and the second optical system according to an embodiment of the invention may be made of molded glass, glass or plastic.

Figure 9 is a schematic illustration of a projection optical system in accordance with an embodiment of the present invention. As shown in FIG. 9, the projection optical system 200 includes an image processing element 202, a total reflection 稜鏡 204, a refraction unit 210, and a reflection unit 220. The refraction unit 210 may include a first lens group 212 and a second lens group 214 between the object side (the left side of FIG. 9) and the image side (the right side of FIG. 9), and the second lens group 214 is disposed on the first lens group. 212 is between the reflective unit 220 and the reflective unit 220 can include at least one reflector 222. At least one of the second lens groups 214 is translatable along the optical axis 201 of the projection optical system 200 to focus, and the lens does not rotate when focusing in a straight-in and straight-out manner.

In an embodiment of the invention, the first lens group 212 may include nine lenses L1-L9 (shown in FIG. 10) that are sequentially arranged along the optical axis 201 from the object side to the image side. The first lens group 212 can include at least one aspherical lens. The second lens group 214 may include five lenses L10-L14 (shown in FIG. 11) sequentially arranged from the object side to the image side along the optical axis 201, and the second lens group 214 may include at least one aspherical lens. The first lens group 212 may include at least one cemented lens member that is combined by a plurality of lenses, and thus the refractive unit 210 including the first lens group 212 and the second lens group 214 may have, for example, a total number of lens members equal to or greater than 10. . The reflector 222 can be a curved mirror with positive refractive power to reflect the light passing through the first lens group 212 and the second lens group 214, and the light reflected by the reflector 222 can be guided to a screen, for example. ). The reflector 222 composed of a curved mirror may have a spherical surface, an aspherical surface, or a mirror surface of a free-form surface, and its shape is not limited at all.

In an embodiment, the projection optical system 200 can satisfy the following formula: 0.9<A/B<1.4, where A is the distance between the refractive unit 210 and the reflective unit 220 on the optical axis 201 of the projection optical system 200, and B Is the total length of the refractive unit on the optical axis 201. In one embodiment, the distance A can be approximately equal to 93.35 mm and the length B can be approximately equal to 76.5 mm. When the length B is small, the space occupied by the lens assembly as a whole can be smaller. On the other hand, when the distance A is larger, the space occupied by the projection optical system 200 as a whole becomes larger, but the probability of interference phenomenon can be reduced, and the interference phenomenon can be reduced. For example, the light rays leaving the refraction unit 210 are superimposed with the light reflected by the reflection unit 220 to generate an unnecessary interference pattern. Therefore, the above range of A/B ratios is a range of embodiments set forth in balancing the various design factors.

A design embodiment of the refraction unit will be described with reference to Figs. 10 and 11 as follows. In the present embodiment, the first lens group 212 includes, from the object side to the image side, a lens L1 having a positive refractive power, a lens L2 having a negative refractive power, a double lens having a positive refractive power and including a lens L3 and a lens L4. Lens unit with positive refractive power and including lens L5, lens A triplet lens member of L6 and L7, having a negative refractive power and including a lens L8 and a lens L9. The second lens group 214 sequentially includes a lens L10 having a positive refractive power, a lens L11 having a positive refractive power, a lens L12 having a positive refractive power, a lens L13 having a negative refractive power, and a negative refractive power from the object side to the image side. Lens L14. The lens 12 and the lens 13 are translatable along the optical axis of the projection optical system to focus, and the lens 12 and the lens 13 are focused in a straight-in and straight-out manner without rotation. The lens L1 has a convex object side surface S1 and a convex image side surface S2, the lens L2 has a concave object side surface S3 and a concave image side surface S4, the lens L3 has a convex object side surface S5, and the lens L4 has a convex surface. The side surface S6 and the image side surface S7 of the convex surface, the lens L5 has a convex object side surface S8, the lens L6 has a convex object side surface S9, the lens L7 has a convex object side surface S10 and a concave image side surface S11, and the lens L8 The object side surface S13 having a concave surface having a concave object side surface S14 and a concave image side surface S15, the lens L10 having a concave object side surface S16 and a convex image side surface S17, and the lens L11 having a convex object side surface S18 and the image side surface S19 of the concave surface, the lens L12 has a convex object side surface S20 and a concave image side surface S21, the lens L13 has a concave object side surface S22 and a concave image side surface S23, and the lens L14 has a convex object side The surface S24 and the image side surface S25 of the concave surface. An aperture stop 218 is located between lens L7 and lens L8. In this design example, the lens L1 in the first lens group 212 may be an aspherical lens, the lens L12 and the lens L14 in the second lens group 214 may be aspherical lenses, and the other lenses L2-L11, L13 may be Spherical lens. The aperture value (f-number) of the refraction unit 210 may be, for example, not more than 2, and the Nyquist frequency of the refraction unit 210 may be, for example, equal to or greater than 70 line pairs/mm, and a preferred range may be 70-150. Pair/mm. In one embodiment, the Nyquist frequency of the refractive unit 210 can be about 95 line pairs/mm, and the aperture value (f-number) can be about 1.4.

The optical parameter values of the above design examples are shown in Table 1 below, and the aspherical curve equation of the above aspherical lens is expressed as follows: In the above formula, z is the offset of the optical axis direction (sag), that is, the point on the aspherical surface from the optical axis r, and the relative distance from the tangent plane tangent to the vertex on the aspherical optical axis, c Is the reciprocal of the radius of the osculating sphere, that is, the reciprocal of the radius of curvature near the optical axis, r is the aspheric height, which is the height from the center of the lens to the edge of the lens, and k is the quadric constant (conic Constant), and α 1- α 8 are aspherical aspheric coefficients, and the high-order terms and quadratic constant values of the aspheric surfaces of the respective lenses are as shown in Table 2.

Furthermore, in an embodiment, the reflector 222 can be an aspherical mirror, and the curve equation of the aspherical mirror is expressed as follows: The aspherical coefficient α i of the aspherical mirror in the above formula is shown in the following table:

Figure 12 is a schematic view showing a projection optical system according to another embodiment of the present invention. As shown in FIG. 12, the projection optical system 300 includes a refraction unit 310 and a reflection unit 320. The reflection unit 320 can include two reflectors 322 and 324. In the embodiment, the reflector 322 is a plane mirror and the reflector 324 is a curved mirror, and the shape of the curved mirror constituting the reflector 324 is not limited and can be, for example, an aspherical mirror, and the aspherical mirror equation and the design parameters of Table 3 are also applicable. The light I1 or the light I2 passes through the refraction unit 310 and is then sequentially reflected by the reflector 322 (for example, a plane mirror) and the reflector 324 (for example, a curved mirror) to leave the reflection unit 320. In other words, the last encounter of the ray I1 or the ray I2 before leaving the reflecting unit 320 is that the reflector is the reflector 324, and the ray I1 or the ray I2 is reflected by the last encountered reflector 324 and then directed to a screen (not shown). Therefore, the distance P between the refraction unit 310 and the last reflector 324 on an optical axis 301 of the projection optical system 300 is equal to the distance P1 between the refraction unit 310 and the reflector 322 on the optical axis 301 plus the reflector 322 and The distance P2 of the reflector 324 on the optical axis 301 (P = P1 + P2).

Therefore, in an embodiment, the projection optical system 300 can satisfy the following formula: 0.9<P/B<1.4, where P is the reflector (reflector 324) encountered by the refractive unit 310 and the last one of the light in the reflective unit 320. The distance between the two on the optical axis 301 of the projection optical system 300, and B is the total length of the refractive unit 310 on the optical axis 301.

13 to 15 show optical simulation results of the refractive unit of the projection optical system of Fig. 12. 13 is a lateral chromatic aberration diagram, and FIGS. 14 and 15 are graphs of optical transfer functions, the horizontal axis of which is a spatial frequency in cycles per millimeter, and the vertical axis is an optical transfer function value. The simulation results shown in FIGS. 13 to 15 are all within the standard range, that is, the projection optical system of the embodiment of the present invention can have good image quality.

The embodiment of the invention comprises a spherical lens, an aspherical lens and a mirror to form a projection optical system, which can effectively shorten the focal length, reduce the lens body and improve the aberration, and has a good resolution when projected to each size screen.

It is noted that the parameter values listed in Tables 1-3 are merely illustrative and not limiting. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art may make modifications to the design parameters or settings of the embodiments of the present invention without departing from the invention. Spirit and scope. Therefore, any lens system having the same structure as the embodiment of the present invention, even if it has different design parameters or settings, is covered by the protection scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧Portable Projector

110‧‧‧Huangguang Module

120‧‧‧heating mechanism

130‧‧‧First optical system

140‧‧‧reflecting elements

150‧‧‧Second optical system

160‧‧‧focus wheel

170‧‧‧Shell

Claims (10)

A projection apparatus comprising: a first optical system having a first optical axis inclined with respect to a horizontal plane and at least one non-circular optical lens; a lens barrel accommodating the first optical system and corresponding to the a non-circular shape member of the at least one non-circular optical lens; a reflective member having a first reflective surface such that an axis of the first optical axis is in contact with the first reflective surface; and a second optical The system has a second reflective surface that accepts an image of light from the first reflective surface. The projection device of claim 1, wherein the first optical system has a front group optical lens assembly and a rear group optical lens assembly, the at least one non-spherical optical lens being located in the front group optical lens assembly . The projection device of claim 2, further comprising: a focusing mechanism that moves at least one of the optical lenses of the front group optical lens assembly. The projection device according to any one of claims 1 to 3, wherein the reflective member has an adjustment mechanism for tilting the reflective member at least up and down or left and right by a plurality of adjustment screws. The projection apparatus according to any one of claims 1 to 3, wherein the second optical system has an adjustment mechanism, and the second adjustment screw is used to make the second The optical system is tilted at least up and down or left and right. The projection device of claim 5, further comprising a plurality of long holes, wherein the optical element is vertically translated by a one-to-one correspondence with the plurality of adjustment screws. A projection apparatus comprising: a first mirror group comprising a plurality of trimmed circular optical lenses, and a first optical axis inclined with respect to a plane of the base; a receiving mechanism having a plurality of trimming circles a containment housing of the lens; a mirror for receiving an image of light from the first group of mirrors; and a concave mirror for receiving the image of light from the mirror. An adjusting mechanism of an optical component, comprising: a plurality of adjusting screws on opposite sides of the optical component; and a plurality of springs corresponding to the plurality of adjusting screws and being sleeved thereon, wherein when located on the opposite sides The plurality of adjusting screws on one side are relatively locked, and the plurality of adjusting screws are relatively loose in a portion on the other side of the opposite sides, so that the optical element is inclined to the side. The adjusting mechanism of the optical component of claim 8, further comprising a plurality of long holes, wherein the optical elements are vertically translated by a one-to-one correspondence with the plurality of adjusting screws. The adjustment mechanism of the optical element according to claim 8 or 9, wherein the optical element has a reflecting surface.