CN206669627U - A flashlight lens with oval texture - Google Patents

Abstract

The utility model provides a flash lamp lens of oval line relates to flash lamp lens field. The utility model comprises a lens, the bottom of the lens is an incident surface, the top of the lens is an emergent surface, Fresnel lines are arranged on the incident surface, and the Fresnel lines comprise a plurality of concentric ellipses; a plane rectangular coordinate system x-y is arranged on the incident plane, the origin of the plane rectangular coordinate system x-y is superposed with the central point of the lens, and the Fresnel lines form an axisymmetric relation with respect to the x axis or the y axis. The utility model discloses the facula of formation is at a dimension compression or tensile, forms the facula of type rectangle promptly, can match with the rectangle visual field that the cell-phone was shot, makes the emergent light of LED chip concentrate on in the effective illumination area more, can effectively improve the utilization ratio of energy, and the facula will reach same luminance and homogeneity, only needs less power, can effectively reduce the loss of energy.

Description

A flashlight lens with oval texture

technical field

The utility model relates to the field of flashlight lenses, in particular disclosing a flashlight lens with elliptical lines.

Background technique

LED has high luminous efficiency, low power consumption, long service life, and safety. It is an environmentally friendly and reliable light source, and is widely used in various display lighting fields. The mobile phone is an indispensable tool in modern life. It integrates various functions, one of which is the camera function. Taking pictures in an environment with insufficient light requires the cooperation of a flash. The flash of a mobile phone is generally used with an LED chip and a lens.

Existing flashlight lenses include one or more LED chips, and are equipped with circular or square lenses. The lenses generally use Fresnel lenses, and the corresponding lines on a single LED are basically circular Fresnel lines. , the finally formed lighting spots are all close to circular symmetrical spots, and most of the photos and images taken by mobile phones are rectangular images. The field of view of the camera leads to low light energy utilization efficiency of the flash.

Utility model content

Based on this, it is necessary to address the existing technical problems and provide a flash lens with elliptical texture, so that the formed light spot is rectangular, which can match the field of view of the mobile phone, and has a high utilization rate of light energy.

In order to solve the problems in the prior art, the utility model discloses a flashlight lens with elliptical patterns, which includes a lens, the bottom of the lens is the incident surface, the top of the lens is the exit surface, and the incident surface is provided with Fresnel patterns, and the Fresnel patterns include Several concentric ellipses; a plane Cartesian coordinate system x-y is set on the incident surface, the origin of the plane Cartesian coordinate system x-y coincides with the center point of the lens, and the Fresnel pattern is axisymmetric about the x-axis or y-axis.

Further, the center point of the Fresnel pattern coincides with the center point of the lens.

Further, an LED chip is arranged below the central point of the Fresnel pattern.

Furthermore, both focal points of the Fresnel pattern are on the x-axis.

Further, the lens is arranged on the lens seat.

The LED chip is placed directly below the incident surface, and the light emitted by the LED chip is incident on the incident surface. The Fresnel pattern on the incident surface stretches the light spot formed by the LED chip in the x-axis direction and compresses it in the y-axis direction, so that The light spot formed by the LED chip through the lens is in the shape of a rectangle, which highly matches the shape of the field of view of the mobile phone.

The beneficial effects of the utility model are as follows: the utility model discloses a flashlight lens with elliptical lines, and the pattern of the flashlight lens is composed of a group of concentric ellipses, and the formed light spot is compressed or stretched in one dimension, that is, a rectangular light spot is formed , can match the rectangular field of view captured by the mobile phone, so that the outgoing light of the LED chip is concentrated in the effective lighting area, which can effectively improve the utilization rate of energy. To achieve the same brightness and uniformity of the light spot, only less power is required. Can effectively reduce energy loss.

Description of drawings

FIG. 1 is a schematic diagram of the relationship between the light spot formed in the prior art and the field of view captured by the mobile phone.

FIG. 2 is a schematic diagram of light spots formed by flash lamps in the prior art.

Fig. 3 is a schematic structural view of the utility model viewed from above.

Fig. 4 is a schematic cross-sectional structure diagram of the utility model along the x-axis in Fig. 3 .

Fig. 5 is a schematic diagram of the relationship between the light spot formed by the present invention and the field of view captured by the mobile phone.

Fig. 6 is a schematic diagram of the light spots formed by the present invention.

The reference signs are: lens 10 , incident surface 11 , outgoing surface 12 , Fresnel pattern 20 , LED chip 30 .

detailed description

In order to further understand the features, technical means, and specific objectives and functions of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Refer to Figures 1 to 6.

The utility model discloses a flashlight lens with elliptical lines, which comprises a lens 10, the lens 10 is arranged on a lens seat 13, the bottom of the lens 10 is an incident surface 11, the top of the lens 10 is an exit surface 12, and a Fresnel is arranged on the incident surface 11 The Fresnel pattern 20, the Fresnel pattern 20 comprises several concentric ellipses, and the two foci of the Fresnel pattern 20 are all on the x-axis; the plane Cartesian coordinate system x-y is set on the incident surface 11, and the origin of the plane Cartesian coordinate system x-y Coincident with the center point of the lens 10 , the Fresnel pattern 20 is symmetrical about the x-axis or the y-axis, and the LED chip 30 is disposed under the lens 10 .

The light emitted by the LED chip 30 enters the lens 10 from the incident surface 11, the x-axis passes through the m Fresnel lines 20, the y-axis passes through the n first Fresnel lines 20, m<n, the LED chip 30 passes through the phenanthrene The light spot formed by the Neel pattern 20 is compressed in the y-axis direction and stretched in the x-axis direction. Therefore, the light spot formed by the LED chip 30 passing through the entire lens 10 is compressed in the y-axis direction and stretched in the x-axis direction. Stretching occurs in the direction, and the formed light spot is similar to a rectangle, and then the lens of the present utility model is matched with the camera of the mobile phone, that is, the x-axis direction is matched with the direction in which the mobile phone's field of view is wider, and the y-axis direction is matched with the mobile phone's field of view. Field narrower direction matches the setting.

In order to improve the matching degree of the light spot formed by the lens and the field of view of the mobile phone, the center point of the Fresnel pattern 20 coincides with the center point of the lens 10, and an LED chip 30 is arranged below the center point of the Fresnel pattern 20. The light emitted by the LED chip 30 can be evenly incident on the incident surface 11, that is, the light emitted by the LED chip 30 can be evenly incident on the Fresnel pattern 20, and the light emitted by the LED chip 30 can be directed to the x-axis direction through the Fresnel pattern 20 Evenly stretched and uniformly compressed in the y-axis direction, the formed light spot is more compatible with the field of view captured by the mobile phone, and the brightness is more uniform, which can effectively improve the uniformity of light emitted by the LED chip 30 and fully correspond to different Fresnel patterns, which can effectively improve The utilization rate of the light energy emitted by the LED chip 30.

The utility model includes a group of concentric elliptical lines, which can stretch or compress the light spot in one dimension, thereby forming a rectangular light spot, which can effectively match the field of view captured by the mobile phone, so that the outgoing light of the LED chip can be concentrated in the In the effective lighting area, the utilization rate of light energy can be effectively improved.

The above-mentioned embodiments only express several implementations of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (5)

1. a kind of flashlight lens of oval lines, it is characterised in that including lens (10), the bottom of the lens (10) is The plane of incidence (11), lens (10) top is exit facet (12), and the plane of incidence (11) is provided with Fresnel lines (20), institute Stating Fresnel lines (20) includes several with center ellipse；Plane right-angle coordinate x-y is set on the plane of incidence (11), The origin of the plane right-angle coordinate x-y overlaps with the central point of the lens (10), and the Fresnel lines (20) is on x Axle or y-axis are into axial symmetry relation.

A kind of 2. flashlight lens of oval lines according to claim 1, it is characterised in that the Fresnel lines (20) central point overlaps with the central point of the lens (10).

A kind of 3. flashlight lens of oval lines according to claim 1, it is characterised in that the Fresnel lines (20) LED chip (30) is provided with below central point.

A kind of 4. flashlight lens of oval lines according to claim 1, it is characterised in that the Fresnel lines (20) two focuses are all in x-axis.

5. the flashlight lens of a kind of oval lines according to claim 1, it is characterised in that the lens (10) set In on lens mount (13).