Projection lens and lighting fixture for vehicle

Abstract

To provide a projection lens which prevents occurrence of glare and decrease in light distribution pattern accuracy due to abnormal refraction in lens peripheral edge regions, and to provide a lighting fixture for a vehicle.SOLUTION: A projection lens 2 includes resin lenses 21 to 23 arranged side-by-side in a lens optical axis Lx direction in a lens barrel 20 and projects light emitted from a light source 30 in a required light distribution pattern. A light-shielding ring 25 covering peripheral edge regions of the lenses is disposed between the lenses 21, 22 which are located adjacent to one another in the lens optical axis direction. The light-shielding ring 25 prevents abnormal refraction due to light passing through low-accuracy regions (AL) generated at peripheral edges of the resin-molded lenses 21-23, and prevents occurrence of glare and decrease in accuracy of the light distribution pattern.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a projection lens made up of a plurality of lenses, and to a vehicle lamp suitable for use in a headlamp that uses this projection lens to project light in a required light distribution pattern. [Background technology]

[0002] Projector-type headlamps that project light from a light source in a required light distribution pattern using a projection lens have been proposed as headlamps for vehicles such as automobiles. In this type of lamp, the projection lens may be configured as a compound lens having multiple lenses in order to reduce lens aberration in the projection lens and increase the pattern accuracy of the light distribution pattern. Also, in order to reduce the weight of the projection lens, it has been proposed to form the projection lens from resin. Patent Document 1 describes a projection lens consisting of multiple lenses formed from resin.

[0003] However, resin lenses are prone to have areas where the molding accuracy of the lens shape is reduced (hereinafter referred to as low-precision areas) in the peripheral area of ​​the lens, that is, in the case of a circular lens, in the circumferential area along the circumference of the lens, due to "sinks" and "welds" that occur during molding. In such low-precision areas, abnormal refraction occurs, in which light refracted by the lens is not refracted as designed. When this abnormal refraction occurs, there is a problem that the pattern accuracy of the light distribution pattern in the headlamp is reduced. Alternatively, there is a problem that the abnormally refracted light becomes glare light that dazzles other vehicles.

[0004] In recent years, headlamps with ADB (Adaptive Driving Beam) light distribution control have been proposed, which controls light distribution so as not to dazzle other vehicles, such as oncoming vehicles and preceding vehicles, or pedestrians, detected from images captured by a camera, etc. Projection lenses for performing such ADB light distribution control are often configured as compound lenses made up of multiple lenses in order to reduce lens aberration, and therefore the number of abnormal refraction sites increases throughout the compound lens, resulting in a significant decrease in pattern accuracy and the occurrence of glare. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2017-204400 A Summary of the Invention [Problem to be solved by the invention]

[0006] The technology of Patent Document 1 has a configuration in which the lenses are held by a frame-shaped holder (also called a lens fitting) that supports the peripheral parts of multiple lenses. Therefore, it is considered possible to block abnormally refracted light and solve the problem caused by abnormal refraction by covering the peripheral area of ​​the lens with this lens holder. However, this configuration requires multiple holders to hold multiple lenses, which creates a problem that the structure of the compound lens becomes complicated. In addition, in order to reduce the size and weight of the lamp, it is possible to reduce or omit the holder, for example, by gluing or welding the lens to the holder. However, if such a configuration is adopted, it becomes impossible to cover the peripheral area of ​​the lens using the holder, and the problem caused by abnormal refraction cannot be solved.

[0007] An object of the present invention is to provide a projection lens that solves the problems caused by abnormal refraction in the lens peripheral region and can form a highly accurate light distribution pattern that does not cause glare, and a vehicle lamp equipped with this projection lens. [Means for solving the problem]

[0008] The present invention is a projection lens in which a plurality of resin lenses are arranged in a lens barrel in the lens optical axis direction, and which projects light emitted from a light source in a required light distribution pattern, and a light shielding ring that covers the peripheral area of ​​the lens is arranged between adjacent lenses in the lens optical axis direction of the projection lens.The present invention is also a projection lens in which at least one resin lens and at least one glass lens are arranged in a lens barrel in the lens optical axis direction, and which projects light emitted from a light source in a required light distribution pattern, and a light shielding ring that covers the peripheral area of ​​the resin lens is arranged between adjacent lenses in the lens optical axis direction of the projection lens.

[0009] In the present invention, the peripheral region of the lens is a region including a low-precision region generated when the lens is resin-molded, and the light-shielding ring is shaped to cover at least this low-precision region. The lens has a lens effective region through which light for projecting a light distribution pattern is transmitted, and a flange portion provided on the peripheral portion of this lens effective region, and it is preferable that the peripheral region of the lens is a region along the boundary between the lens effective region and the flange portion.

[0010] The present invention is a vehicle lamp including a light source and a projection lens that projects the light emitted from the light source in a required light distribution pattern, and the projection lens has a light shielding ring that covers the peripheral area of ​​the lens between adjacent lenses in the lens optical axis direction. For example, the light source is composed of a multi-segment light-emitting element in which many minute light-emitting elements are arranged, and the ADB light distribution control is performed by controlling the light emission of the minute light-emitting elements. Effect of the Invention

[0011] According to the present invention, the light shielding ring that covers the peripheral area of ​​the lens can prevent abnormally refracted light from being projected. This provides a projection lens and a vehicle lamp that can prevent glare and a decrease in the accuracy of the light distribution pattern caused by abnormal refraction. [Brief description of the drawings]

[0012] [Figure 1] 1 is a perspective view of a schematic configuration of a headlamp including a projection lens according to an embodiment of the present invention; [Diagram 2] FIG. 2 is an external perspective view of a schematic configuration of an ADB lamp unit. [Diagram 3] Block diagram of the ADB control system. [Figure 4] A longitudinal cross-sectional view of the ADB lamp unit. [Diagram 5] FIG. [Figure 6] FIG. 4 is a vertical cross-sectional view illustrating a low-precision region in a lens. [Figure 7] 1A and 1B are diagrams for explaining a light-shielding ring, in which FIG. 1A is an exploded perspective view with a part cut away, and FIG. [Figure 8] FIG. 4 is a light distribution characteristic diagram showing an example of a light distribution pattern. [Figure 9] FIG. 11 is a vertical cross-sectional view of an ADB lamp unit according to another embodiment. [Figure 10] FIG. 13 is a vertical cross-sectional view of an ADB lamp unit according to another embodiment. [Figure 11] FIG. 13 is an exploded perspective view of a lens and a light blocking ring according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Next, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a schematic configuration of an automobile equipped with a headlamp to which the present invention is applied, and a schematic perspective view of the headlamp. Left and right headlamps R-HL, L-HL are attached to the left and right front parts of the body of an automobile CAR, respectively. Each headlamp R-HL, L-HL is equipped with an ADB light distribution control ADB lamp unit ALU, and is disposed in a lamp housing 100. An auxiliary lamp unit equipped with a light guide (light guide), such as a clearance lamp unit CLU, is also disposed in this lamp housing, but a description thereof will be omitted here.

[0014] The lamp housing 100 includes a lamp body 101 that opens toward the front of the vehicle, and a light-transmitting cover 102 that is attached to the opening, and an ADB lamp unit ALU is disposed inside the lamp housing 100. The ADB lamp unit ALU, which will be described in detail later, is configured to project an ADB light distribution pattern by irradiating light emitted from a light source to the front area of ​​the vehicle using a projection lens. In this form, the ADB lamp unit ALU is also capable of projecting light distribution patterns including low beam distribution and high beam distribution.

[0015] Fig. 2 is an external perspective view of a schematic configuration of the ADB lamp unit ALU. In Fig. 2, the lamp unit case 1 includes a heat sink 10 as shown in simplified imaginary lines, and a light source unit 3 is disposed inside. The light source unit 3 includes a micro LED (light emitting diode) array 31 as a light source, and this micro LED array 31 is mounted on a light source board 30 that is internally supported in the unit case 1. The micro LED array 31 includes a large number of minute LEDs 32 that emit white light, which are arranged vertically and horizontally in a matrix, and the light emission of any of the minute LEDs is selectively controlled by an ADB control system 4 described later.

[0016] In addition, the ADB lamp unit ALU is equipped with a projection lens 2 having multiple lenses 21-23 built inside a lens barrel 20, and is configured to project light emitted by the micro LED array 31 toward the front of the lamp and project a required light distribution pattern, i.e., a light distribution pattern corresponding to the light source pattern formed when the tiny LEDs 32 of the micro LED array 31 are emitted.

[0017] 3 is a block diagram of the ADB control system 4, and includes an ADB control circuit 41 that controls the light emission of the micro LED array 31 as a light source. A lighting control switch 43 operated by the driver is connected to the ADB control circuit 41, and the light emission of the micro LED array 31 is controlled by setting and operating the lighting control switch 43. A vehicle ECU (electronic control unit) 42 to which an in-vehicle camera 44 is connected is connected to the ADB control circuit 41, and the vehicle ECU 42 detects a forward vehicle present in the forward area based on an image of the forward area of ​​the automobile captured by the in-vehicle camera 44. The ADB control circuit 41 is configured to perform ADB light emission control of the micro LED array 31 so as not to dazzle the forward vehicle detected by the vehicle ECU 42 when set to ADB control.

[0018] Fig. 4 is a vertical cross-sectional view of the ADB lamp unit ALU, and Fig. 5 is an exploded perspective view of the lenses 21-23 of the projection lens 2. The lens barrel 20 of the projection lens 2 is made of resin, with its rear portion configured as a fixed portion 201 and the area in front of the fixed portion 201 configured as a lens holding portion 202. The fixed portion 201 is shaped to cover the front side of the light source portion 3, and is connected to the unit case 1 so that the lens barrel 20 is fixed and supported by the unit case 1. The lens holding portion 202 is formed in a cylindrical shape, and the first to third lenses 21-23 are arranged and held therein.

[0019] The three lenses 21-23 arranged inside the lens barrel 20 are configured as a triplet lens having three lenses, a first lens 21, a second lens 22, and a third lens 23, from the front to the rear, and the projection lens 2 is configured as a compound lens having positive refractive power as a whole. Each of the lenses 21-23 is internally held in the lens barrel 20 with the lens optical axis arranged coaxially with the lens optical axis Lx of the projection lens 2. Note that the front-rear direction means the front-rear direction of the lamp along the lens optical axis Lx of the projection lens 2.

[0020] The first to third lenses 21 to 23 are all made of a light-transmitting resin. For example, they are made of PMMA (acrylic resin) or PC (polycarbonate resin). The first lens 21 is made of a biconvex lens having positive refractive power, the second lens 22 is made of a biconcave lens having negative refractive power, and the third lens 23 is made of a biconvex lens having positive refractive power. The lens surfaces of the first to third lenses 21 to 23 are formed into a predetermined spherical or aspherical surface, and the refractive index and Abbe number of the resin constituting each lens are appropriately set, thereby reducing aberration in the projection lens 2.

[0021] A flange portion protruding in the outer diameter direction is formed on the periphery of each of the first to third lenses 21 to 23. The flange portions of the lenses 21 to 23 are referred to as a first flange portion 211, a second flange portion 221, and a third flange portion 231, respectively. Among the lenses 21 to 23, the front and rear surfaces of the flange portions 211, 221, and 231 of the adjacent lenses 21 and 22, and 22 and 23 are abutted against each other in the lens thickness direction, so that the lenses 21 to 23 are maintained at a required lens interval along the lens optical axis Lx.

[0022] The first flange portion 211 has through holes 212 at each of the upper and lower positions that penetrate in the lens optical axis direction. The second flange portion 221 has first projections 222 that protrude forward at each of the upper and lower positions on the front surface, and blind holes 223 that open backward at each of the upper and lower positions on the opposite rear surface. The third flange portion 231 has second projections 232 that protrude forward at each of the upper and lower positions on the front surface. The first projections 222 of the second flange portion 221 are inserted into the through holes 212 of the first flange portion 211. The second projections 232 of the third flange portion 231 are inserted into the blind holes 223 of the second flange portion 221. This allows the first to third lenses 21 to 23 to be positioned relative to each other in the circumferential direction.

[0023] The first to third lenses 21 to 23 arranged in the lens barrel 20 are held by adhesion or welding to the lens barrel 20. For example, although not shown in the figure, radial through-holes are opened at multiple locations on the peripheral surface of the lens barrel 20, and a part of the peripheral surface of each of the lenses 21 to 23 is exposed in each through-hole. Then, laser light is irradiated through the through-holes to melt the through-holes and a part of the peripheral surface of the lenses, thereby welding the lenses 21 to 23. Alternatively, the lenses 21 to 23 are bonded by filling the through-holes with molten adhesive. This eliminates the need for an independent holder for holding the lenses 21 to 23 on the lens barrel 20, reducing the number of components of the projection lens 2 and enabling it to be made smaller and lighter.

[0024] Here, the first to third lenses 21-23 are formed by molding resin in a mold, but where the mold surface, especially the cavity surface, changes at a steep angle, the smooth flow of resin in the mold is hindered, the lens shape is not formed as designed, and low-precision areas with reduced shape precision may be formed as described above. Fig. 6 is an enlarged view of a part of each lens 21-23, and low-precision areas AL are likely to be formed in each lens 21-23 around the lens effective area LU (area through which light is transmitted to form a light distribution pattern such as a spherical or aspherical surface) LU, in other words, in the peripheral area of ​​the lens effective area LU which is the boundary area with the flange parts 211, 221, 231.

[0025] In particular, the lens effective areas LU on the front surface of the first lens 21 and the front surface of the third lens 23 are formed of curved surfaces with a relatively short radius of curvature compared to the lens effective areas of the other lenses, so the low-precision areas AL become prominent in these areas. When such low-precision areas AL are formed, abnormal refraction occurs in which the light passing through the lens effective area LU is not directed in the direction as designed, and as described below, the accuracy of the projected light distribution pattern is reduced or glare occurs. Note that low-precision areas AL may also be formed on the rear surfaces of the first lens 21 and the third lens 23, or on the front and rear surfaces of the second lens 22.

[0026] In the projection lens 2, a light shielding ring is used to prevent the deterioration of the light distribution pattern accuracy and the occurrence of glare, which are caused by the low-precision area AL. As will be described in detail later, as shown in an enlarged perspective view and an enlarged longitudinal sectional view in Fig. 7(a) and (b), which are partially cut away, an annular recess 213 is formed in a required dimension in the lens optical axis direction at a portion along the inner circumference of the first flange portion 211 on the rear surface of the first lens 21. A light shielding ring 25 is disposed in the recess 213 and is sandwiched between the first lens 21 and the second lens 22. The light shielding ring 25 is formed in the shape of an annular plate from an opaque member. For example, it is formed by punching a metal plate.

[0027] 7(b), the outer diameter of the light shielding ring 25 is set to be approximately equal to the outer diameter of the recess 213 formed in the first flange portion 211, and when the first to third lenses 21 to 23 are installed in the lens barrel 20, the light shielding ring 25 is fitted into this recess 213 and is sandwiched between the first lens 21 and the second lens 22 in the lens optical axis direction. The inner diameter of the light shielding ring 25 is set to a diameter that covers the low-precision area AL occurring on the periphery of the lens effective area LU of the first lens 21. In other words, the inner diameter of the light shielding ring 25 is set to be such that the inner edge is located on the inner diameter side of the low-precision area AL.

[0028] In the headlamp HL equipped with the projection lens 2 configured as above, when the driver sets the lighting control switch 43 to high beam distribution, the ADB control circuit 41 causes almost all of the micro LEDs 32 of the micro LED array 31 to emit light, and a high beam light distribution pattern PHi is projected as shown in Fig. 8(a). When the lighting control switch 43 is set to low beam distribution, a low beam light distribution pattern PLo having a cutoff line COL is projected. In the figure, V is a vertical line passing through the optical axis Lx of the projection lens, and H is a horizontal line passing through an angular position slightly above the optical axis Lx.

[0029] When the lighting control switch 43 is set to ADB light distribution control, the vehicle ECU 42 detects a preceding vehicle Ob1 and an oncoming vehicle Ob2 as vehicles in front of the vehicle based on an image captured by the vehicle-mounted camera 44. When a vehicle in front is detected, the ADB control circuit 41 projects an ADB light distribution pattern PA in which the area corresponding to the lighting area overlapping with the detected vehicle in front is dimmed or turned off. As shown in FIG. 8(b), this ADB light distribution pattern PA selectively dims or blocks the lighting area to which the vehicles in front Ob1 and Ob2 belong to prevent dazzling the vehicles in front Ob1 and Ob2. The lighting area in which the vehicles in front do not exist is illuminated with a predetermined brightness, and ADB light distribution control with improved visibility is executed.

[0030] In projecting the ADB light distribution pattern PA, as shown in Fig. 8(b), it is required to sharpen the boundary between the shaded or dimmed area where the forward vehicles Ob1 and Ob2 are present and the illuminated area where they are not present. If the boundary is not sharp, a part of the light pattern may be irradiated to the forward vehicles Ob1 and Ob2, causing a risk of dazzling the occupants of the forward vehicles. In this case, if abnormal refraction occurs in the projection lens 2, the abnormally refracted light is projected into the dimmed or shaded area, resulting in a decrease in the accuracy of the light distribution pattern and glare.

[0031] In the projection lens 2 of the embodiment, the light shielding ring 25 is disposed between the first lens 22 and the second lens 23, so that the light abnormally refracted in the low-precision area AL of the first lens 21 can be shielded. As shown in FIG. 7B, among the light emitted from the light source unit 3 and transmitted through the third lens 23 and the second lens 22, the light L1 incident on the peripheral portion of the first lens 21 is normally refracted by the first lens 21 as designed and becomes effective light for forming a light distribution pattern as shown by the light La indicated by the two-dot chain line, if the light shielding ring 25 does not exist. However, if the low-precision area AL exists in the first lens 21, the light L1 is abnormally refracted in the low-precision area AL when it is emitted from the first lens 21 as shown by the light Lb indicated by the dashed line. Therefore, the abnormally refracted light makes the boundary of the illumination area unclear, resulting in a decrease in the precision of the light distribution pattern and glare.

[0032] In the embodiment, since the light shielding ring 25 is provided, the light L1 is shielded by the light shielding ring 25 and prevented from being projected forward from the first lens 21. In this manner, the light L1 directed toward the low-precision area AL of the first lens 21 is shielded by the light shielding ring 25 and prevented from being incident on the first lens 21, so that abnormally refracted light is not emitted from the first lens 21. Therefore, the light emitted from the projection lens 2 and projected toward the light distribution area of ​​the light distribution pattern does not contain abnormally refracted light, and the boundary of the illumination area shown in FIG. 8 does not become unclear due to the abnormally refracted light, and it is possible to prevent deterioration of the accuracy of the light distribution pattern and glare.

[0033] Furthermore, in the projection lens 2 of the embodiment, the first to third lenses 21-23 are directly held by the lens barrel 20, eliminating the need for separate holders for holding the lenses 21-23. This allows the number of parts constituting the projection lens 2 to be reduced, making it possible to reduce the weight and size of the projection lens 2.

[0034] As another embodiment of the present invention, a light shielding ring 26 may be disposed between the second lens 22 and the third lens 23 as shown in Fig. 9. In this case, for example, a recess 233 is formed in the peripheral portion of the front surface of the third lens 23. The light shielding ring 26 is fitted into this recess 233 and is formed so as to be sandwiched between the second lens 22 and the third lens 23. The light shielding ring 26 is formed so as to cover the low-precision area AL occurring in the peripheral portion of the effective lens surface of the third lens 23 as shown in Fig. 6. At the same time, the light shielding ring 26 may be formed so as to cover the low-precision area AL occurring in the second lens 22.

[0035] In this embodiment, light emitted from the light source unit 3 is incident on the projection lens 2 and passes through the third lens 23 and the second lens 22. At this time, abnormal refraction may occur in the low-precision area AL of the third lens 23, but this light is blocked by the light blocking ring 26. Therefore, such abnormally refracted light is not emitted from the projection lens 2 and projected toward the light distribution area of ​​the light distribution pattern, the boundary of the illumination area shown in FIG. 8 does not become unclear, and it is possible to prevent deterioration of the accuracy of the light distribution pattern and glare.

[0036] Furthermore, although not shown, two light shielding rings may be provided on the projection lens 2. That is, a light shielding ring 25 provided between the first lens 21 and the second lens 22 as shown in Fig. 4, and a light shielding ring 26 provided between the second lens 22 and the third lens 23 as shown in Fig. 9 may both be provided. In this way, almost all of the light abnormally refracted in the low-precision areas of the first to third lenses 21 to 23 is shielded by these two light shielding rings 25 and 26, which further prevents deterioration of the precision of the light distribution pattern and glare.

[0037] The present invention may also include a lens in which a part of the projection lens 2 is made of glass. FIG. 10 is a vertical cross-sectional view of a projection lens 2A of an ADB lamp unit ALU as an example, and parts equivalent to the projection lens 2 are given the same reference numerals. This projection lens 2A is made of four lenses, the first lens 21 and the second lens 22 are made of resin, and the third lens 23 and the fourth lens 24 are made of glass. For example, N-K9L (borosilicate crown glass) is used as the glass. The third lens 23 and the fourth lens 24 are configured as plano-convex lenses with their spherical surfaces facing each other. A light-shielding ring 25 is disposed between the second lens 22 and the third lens 23. This light-shielding ring 25 is disposed so as to cover at least the low-precision area formed on the periphery of the second lens 22, and is sandwiched between the third lens 22 and the third lens 23.

[0038] In this projection lens 2A, the light passing through the low-precision area formed on the periphery of the second lens 22 is blocked by the light blocking ring 25, and the effect of preventing a decrease in the precision of the light distribution pattern and glare can be obtained. Moreover, according to this projection lens 2A, the third lens 23 and the fourth lens 24 arranged in close proximity to the light source unit 3 are formed of glass, so that the thermal deformation of the fourth lens 24 and the third lens 23 due to the heat generated by the micro LED array 31 of the light source unit 3 is prevented. Moreover, the third lens 23 and the fourth lens 24 suppress the heat of the light source unit 3 from being transferred to the second lens 22 or the first lens 21, and the thermal deformation of these resin lenses is prevented.

[0039] The projection lens of the embodiment described above is configured with a lens having a circular shape when viewed from the front direction, but as shown in the exploded perspective view of FIG. 11, a part of the circular peripheral portion, here each of the upper and lower sides, may be cut off to form a lens 21A having a shape close to a horizontally long oval shape when viewed from the front. These upper and lower sides are areas through which light that contributes to the formation of the light distribution pattern as shown in FIG. 8 does not pass. Even in the lens 21A having such a shape, when resin molding is performed, a low-precision area may occur in the boundary area with the flange part of the peripheral portion of the lens. Therefore, by forming the light shielding ring 25 into a shape corresponding to the lens 21A and sandwiching it between adjacent lenses, the influence of abnormal refraction of light generated in the low-precision area on the light distribution pattern is prevented.

[0040] Here, the ADB lamp unit of the embodiment shows an example in which the light source is a micro LED array, i.e., a multi-segment LED, forming an ADB light distribution, but it can also be applied to a lamp using a MEMS (micro electro mechanical systems) mirror array as a light source. Alternatively, it is not limited to a lamp configured to directly project light from a light source with a projection lens, but can also be applied to a lamp using a projection lens that projects light scanned with reflected light from a rotating mirror and a swinging mirror. [Explanation of symbols]

[0041] 1 ADB lamp unit 2,2A Projection lens 3 Light source section 4. ADB Control System 10 Unit case (heat sink) 20 Lens barrel 21~24 1st lens~4th lens 25~27 Shading ring 31 Micro LED Array 32 Micro LED L-HL, R-HL headlamp ALU ADB lamp unit AL low accuracy area LU Lens Effective Area

Claims

1. A projection lens in which a plurality of resin lenses are arranged in a lens barrel in the direction of the lens optical axis, and which projects light emitted from a light source in a required light distribution pattern, characterized in that a light-shielding ring that covers the peripheral area of ​​the lens is arranged between adjacent lenses in the direction of the lens optical axis.

2. 2. The projection lens according to claim 1, wherein the peripheral region of the lens includes a low-precision region that occurs when the lens is molded from resin, and the light-shielding ring is shaped to cover at least this low-precision region.

3. 2. The projection lens according to claim 1, wherein the lens has a lens effective area through which light for projecting a light distribution pattern is transmitted, and a flange portion provided on the peripheral portion of the lens effective area, and the peripheral area of ​​the lens is an area along the boundary between the lens effective area and the flange portion.

4. 2. The projection lens according to claim 1, wherein the light blocking ring is configured to block light that is about to pass through a peripheral area of ​​the lens.

5. 2. The projection lens according to claim 1, wherein the light blocking ring is disposed between adjacent lenses and is sandwiched between the lenses in the direction of the lens optical axis.

6. 2. The projection lens according to claim 1, wherein the projection lens is held on the lens barrel by welding or adhesive.

7. A projection lens in which at least one resin lens and at least one glass lens are arranged side by side in the lens optical axis direction within a lens barrel, and which projects light emitted from a light source in a required light distribution pattern, wherein a light-shielding ring that covers the peripheral region of the resin lens is arranged between adjacent lenses in the lens optical axis direction.

8. A vehicle lamp comprising: a light source; and a projection lens that projects light emitted from the light source in a required light distribution pattern, the projection lens comprising at least one resin lens, the resin lens including a low-precision region in its peripheral region, and a light-shielding ring that covers the peripheral region of the resin lens being disposed between adjacent lenses in the direction of the lens optical axis.

9. 9. The vehicle lamp according to claim 8, wherein the light source is composed of a multi-segment light-emitting element in which a large number of minute light-emitting elements are arranged, and ADB light distribution control is performed by controlling light emission of the minute light-emitting elements.

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