Optical filter for ambient light sensor

Abstract

The utility model discloses an optical filter for an ambient light sensor, which relates to the field of optical filtering and comprises an external protective shell, a filtering module is arranged in the external protective shell, optical fiber cables are arranged at two ends of the external protective shell in an extending manner, and conical protective cylinders are sleeved outside the two optical fiber cables. In the actual operation of the optical fiber cable protection device, the plurality of semicircular shells can abut against the outer side of the optical fiber cable, so that the optical fiber cable is always kept in the middle of the conical protection shells, the optical fiber cable is prevented from being bent due to the pulling force, and when the external pulling force is too large, the optical fiber cable is prevented from being damaged. The extrusion force of the optical fiber cable and the semicircular shell is too large, the semicircular shell is broken, polystyrene foam in the semicircular shell seeps out and makes contact with air, liquid colloid is converted into a foamed solid material, the solid material enables the interior of the conical protection barrel on the outer side of the optical fiber cable to be bonded, and the fixing strength of the optical fiber cable is improved.

Description

Technical Field

[0001] The utility model relates to the field of optical filtering, in particular to an optical filter for an ambient light sensor. Background Art

[0002] In order to make the human visual sensitivity match the brightness or color tone of the display in a natural form, it is important to allow only visible light to reach the ambient light sensor. For example, the ambient light sensor can make the spectral sensitivity characteristics close to the visual sensitivity by setting an optical filter such as a near infrared cut filter.

[0003] Optical filters are generally connected to optical fiber lines. Since optical filters are small in size, the connection between the optical fiber line and the optical filter is pulled by external forces and is easily broken.

[0004] Therefore, it is necessary to propose an optical filter for ambient light sensor to solve the above problems. Utility Model Content

[0005] The utility model aims to provide an optical filter for an ambient light sensor, so as to solve the problem that an optical filter is generally connected to an optical fiber line, and due to the small size of the optical filter, the connection between the optical fiber line and the optical filter is pulled by external force and is easily broken.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an optical filter for an ambient light sensor, comprising an external protective shell, a filter module is arranged inside the external protective shell, optical fibers are arranged on both ends of the external protective shell, a conical protective tube is sleeved on the outside of the two optical fibers, one end of the two conical protective tubes is respectively fixed to the two ends of the external protective shell, an inner cavity is opened inside the two conical protective tubes, a plurality of semicircular shells are fixed on the inner wall of the inner cavity, and the interiors of the plurality of semicircular shells are filled with foam glue.

[0007] Preferably, the radius of the two conical protective tubes on the side away from the outer protective shell is smaller than the radius of the side close to the outer protective shell, and the adaptability of the multiple semicircular shells gradually decreases along the length of the conical protective tubes toward the side away from the outer protective shell.

[0008] Preferably, the outer sides of the ends of the two optical fibers extending into the outer protective shell are fixedly connected to fixing plates, and a plurality of return springs are fixed between the fixing plates and the corresponding inner walls of the outer protective shell.

[0009] Preferably, one end of the two optical fiber lines extends into the interior of the outer protective shell, and a stretchable length of 2 cm is reserved.

[0010] Preferably, a silicone gasket is fixed inside one end of the two conical protective tubes away from the outer protective shell, and the optical fiber line sleeve is arranged on the inner ring of the silicone gasket.

[0011] Preferably, a layer of protective sheath is provided on the outer side of the optical fiber.

[0012] Technical effects and advantages of the utility model:

[0013] 1. In the actual operation of the utility model, a plurality of semicircular shells can resist the outer side of the optical fiber line, so that the optical fiber line is always kept in the middle of the conical protective tube, and the optical fiber line is prevented from being bent by the pulling force. At the same time, when the external pulling force is too large, the squeezing force between the optical fiber line and the semicircular shell is too large, which will cause the semicircular shell to rupture, and the foam glue inside the semicircular shell will seep out and contact with the air, so that the liquid colloid is converted into a foamy solid material. The solid material causes the inside of the conical protective tube on the outer side of the optical fiber line to bond, thereby improving the fixing strength of the optical fiber line, protecting the outer side of the optical fiber line, and preventing the optical fiber line from being broken by external force. At the same time, the foam glue has insulating properties and can act as an insulating outer skin.

[0014] 2. In the actual operation of the present invention, when the optical fiber is pulled outward, the pulling force will squeeze the reset spring, and the reset spring can generate elastic force to reset the optical fiber, thereby avoiding the problem of the optical fiber and the filter module being too close to each other and causing tension and breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the structure of an optical filter for an ambient light sensor.

[0016] Figure 2 This is a schematic diagram of the internal structure of the conical protective tube of the utility model.

[0017] In the figure: 1. External protective shell; 2. Optical fiber line; 3. Conical protective tube; 4. Inner cavity; 5. Fixed disk; 6. Reset spring; 7. Semicircular shell; 8. Silicone pad. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clarify the technical solutions in the embodiments of the utility model; it is completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] The utility model provides Figure 1-Figure 2 An optical filter for an ambient light sensor shown includes an outer protective shell 1, a filter module is arranged inside the outer protective shell 1, optical fiber lines 2 are extended from both ends of the outer protective shell 1, and a layer of protective skin is arranged on the outer side of the optical fiber line 2 to protect the outer side of the optical fiber line 2.

[0020] The outside of the two optical fiber lines 2 is respectively covered with a conical protective tube 3, one end of the two conical protective tubes 3 is respectively fixed to the two ends of the external protective shell 1, and the inside of the two conical protective tubes 3 is provided with an inner cavity 4, and a plurality of semicircular shells 7 are fixed on the inner wall of the inner cavity 4, and the interior of the plurality of semicircular shells 7 is filled with foam glue, and the foam glue can be made of polyurethane material.

[0021] The radius of the two conical protective tubes 3 away from the outer protective shell 1 is smaller than the radius of the side close to the outer protective shell 1 , and the adaptability of the multiple semicircular shells 7 gradually decreases along the length of the conical protective tubes 3 toward the side away from the outer protective shell 1 .

[0022] In the actual operation of the utility model, multiple semicircular shells 7 can resist the outside of the optical fiber line 2, so that the optical fiber line 2 is always maintained in the middle of the conical protective tube 3, avoiding the optical fiber line 2 from being bent by the pulling force. At the same time, when the external pulling force is too large, the squeezing force between the optical fiber line 2 and the semicircular shells 7 is too large, which will cause the semicircular shells 7 to rupture, and the foam glue inside the semicircular shells 7 will seep out and come into contact with the air, so that the liquid colloid is converted into a foamy solid material. The solid material causes the inside of the conical protective tube 3 on the outside of the optical fiber line 2 to bond, thereby improving the fixing strength of the optical fiber line 2, protecting the outside of the optical fiber line 2, and avoiding external forces from tearing the optical fiber line 2 off. At the same time, the foam glue has insulating properties and can act as an insulating outer skin.

[0023] A fixing plate 5 is fixedly connected to the outer side of one end of the two optical fiber lines 2 extending into the outer protective shell 1, and a plurality of return springs 6 are fixed between the fixing plate 5 and the corresponding inner wall of the outer protective shell 1. One end of the two optical fiber lines 2 extends into the outer protective shell 1, and a stretchable length of 2 cm is reserved.

[0024] In the actual operation of the present invention, when the optical fiber line 2 is stretched outward by the pulling force, the pulling force will squeeze the reset spring 6, and the reset spring 6 can generate elastic force to reset the optical fiber line 2, thereby avoiding the problem of the optical fiber line 2 and the filter module being too close to each other and causing tension and breakage.

[0025] A silicone gasket 8 is fixed inside the two conical protective tubes 3 at one end away from the outer protective shell 1, and the optical fiber line 2 is sleeved on the inner circle of the silicone gasket 8, which can protect the connection between the optical fiber line 2 and the end of the conical protective tube 3, avoiding contact and friction between the optical fiber line 2 and the inside of one end of the conical protective tube 3, which may cause the optical fiber line 2 to break.

Claims

1. An optical filter for an ambient light sensor, comprising an outer protective shell (1), characterized in that: A filter module is arranged inside the external protective shell (1), optical fiber lines (2) are arranged extending from both ends of the external protective shell (1), a conical protective tube (3) is sleeved outside the two optical fiber lines (2), one end of the two conical protective tubes (3) is respectively fixed to the two ends of the external protective shell (1), an inner cavity (4) is opened inside the two conical protective tubes (3), a plurality of semicircular shells (7) are fixed on the inner wall of the inner cavity (4), and the interior of the plurality of semicircular shells (7) is filled with foam glue.

2. The optical filter for an ambient light sensor according to claim 1, characterized in that: The radius of the two conical protective tubes (3) on the side away from the external protective shell (1) is smaller than the radius of the side close to the external protective shell (1), and the adaptability of the plurality of semicircular shells (7) gradually decreases along the length of the conical protective tubes (3) toward the side away from the external protective shell (1).

3. The optical filter for an ambient light sensor according to claim 1, characterized in that: A fixing plate (5) is fixedly connected to the outer sides of one end of the two optical fiber lines (2) extending into the interior of the external protective shell (1), and a plurality of return springs (6) are fixed between the fixing plate (5) and the corresponding inner wall of the external protective shell (1).

4. The optical filter for an ambient light sensor according to claim 1, characterized in that: One end of the two optical fiber lines (2) extends into the interior of the outer protective shell (1), and a 2 cm stretchable length is reserved.

5. The optical filter for an ambient light sensor according to claim 1, characterized in that: A silicone gasket (8) is fixed inside one end of the two conical protective tubes (3) away from the outer protective shell (1), and the optical fiber line (2) is sleeved on the inner ring of the silicone gasket (8).

6. The optical filter for an ambient light sensor according to claim 1, characterized in that: A layer of protective sheath is provided on the outer side of the optical fiber line (2).

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