CN203164569U

CN203164569U - An optical filter, a camera, and a cell phone

Info

Publication number: CN203164569U
Application number: CN 201320166166
Authority: CN
Inventors: 曾元清; 吴呈煜
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2013-04-03
Filing date: 2013-04-03
Publication date: 2013-08-28
Anticipated expiration: 2023-04-03

Abstract

The utility model relates to the technical field of optical equipment and discloses an optical filter, a camera, and a cell phone. The optical filter comprises blue glass used as a substrate, more than one TiO2 plated film, and more than one SiO2 plated film. The TiO2 plated films and the SiO2 plated films are provided in pairs. The TiO2 plated films and the SiO2 plated films provided in pairs are arranged in an overlapped manner according to a sequence of a TiO2 plated film, a SiO2 plated film, a TiO2 plated film, and a SiO2 plated film. The blue glass is pasted on and connected with a TiO2 plated film of the TiO2 plated films and the SiO2 plated films provided in pairs. The thickness of the SiO2 plated film is 5.2 [mu] m, and the thickness of the TiO2 plated film is 0.2 [mu]m. Light with wavelength from 400 to 630 nm in a visible light region may passes through the optical filter, but near-infrared light with wavelength from 700 to 1100 nm cannot passes through the optical filter. The camera comprises an image sensor, a lens group, and the optical filter. The cell phone comprises the camera.

Description

Optical filter, camera and mobile phone

Technical field

The utility model belongs to the optical devices technologies field, relates in particular to a kind of optical filter, comprises the camera of this optical filter and comprises the mobile phone of this camera.

Background technology

Along with mobile phone constantly develops to miniaturization, intelligent direction, the space of mobile phone is more and more littler; The installing space of camera is also more and more littler, and this just requires the assembly of camera also must miniaturization just can meet the demands; The smalt optical filter that the 0.5mm of Cai Yonging was thick in the past also becomes below the 0.3mm; The general employing on certain substrate of existing infrared fileter alternately forms the metal-dielectric-metal film with certain thickness high index of refraction and low-refraction with Vacuum Coating method, or full deielectric-coating, constitute a kind of rudimentary solid Fabry-Perot interferometer inferior, plural serial stage and realize; The selection of the material of rete, thickness and series system is determined by needed centre wavelength and transmission bandwidth λ; Existing film-stack layered scheme is generally the TiO of smalt+high index of refraction ₂The SiO of film+low-refraction ₂The TiO of film+high index of refraction ₂The SiO of film+low-refraction ₂Film ... realizing, generally all is TiO ₂Thickness 0.3 μ m, SiO ₂ Thickness 5 μ m; Find in the practice that its IR-cut effect is unsatisfactory, still has infrared ray and enters camera in the use.

The utility model content

The technical problems to be solved in the utility model provides a kind of optical filter, and the IR-cut effect that is intended to solve optical filter in the prior art is undesirable, still can occur the problem of ghost in using.

The utility model is achieved in that a kind of optical filter, comprises as the smalt of substrate and more than a slice and paired TiO ₂And SiO ₂Plated film, described paired TiO ₂And SiO ₂Plated film is pressed TiO ₂Plated film, SiO ₂Plated film, TiO ₂Plated film, SiO ₂Plated film ... order overlap described smalt and described paired TiO ₂And SiO ₂TiO in the plated film ₂Plated film is the company of subsides mutually; Described SiO ₂Plated film is that thickness is the plated film of 5.2 μ m, described TiO ₂Plated film is that thickness is the plated film of 0.2 μ m.

Further, described optical filter is that gross thickness is the optical filter of 0.24-0.3mm.

Further, the another side of described smalt also is provided with antireflecting film.

Further, described antireflecting film is 3 layers.

The utility model also provides camera, comprises imageing sensor, lens group, also comprises above-mentioned optical filter, and described optical filter is arranged between described lens group and the described imageing sensor, and described optical filter is coated with described TiO in pairs ₂Plated film, SiO ₂The one side of plated film is relative with described imageing sensor.

Further, described imageing sensor is ccd image sensor.

Further, described imageing sensor is cmos image sensor.

The utility model also provides mobile phone, comprises the above-mentioned camera of being made by above-mentioned optical filter.

Be compared with the prior art, in the optical filter that the utility model provides, because SiO ₂The thickness of plated film is 5.2 μ m, TiO ₂The thickness of plated film is 0.2 μ m, makes visible region 400-630nm high saturating, and near infrared 700-1100nm ends; Thereby make that the IR-cut effect is strengthened, also reach the purpose of miniaturization simultaneously.

The camera that the utility model provides has adopted above-mentioned optical filter, has not only saved the space, has realized miniaturization, and has eliminated sightless near infrared ray fully in using.

The mobile phone that the utility model provides, the camera that has adopted above-mentioned optical filter to make when realizing miniaturization, has also been eliminated near infrared ray simultaneously in the use.

Description of drawings

Fig. 1 is the synoptic diagram of first embodiment of the optical filter that provides of the utility model;

Fig. 2 is the synoptic diagram of second embodiment of the optical filter that provides of the utility model;

Fig. 3 is the camera module synoptic diagram that the utility model provides;

Fig. 4 is the transmitance synoptic diagram that the utility model provides optical filter;

Fig. 5 is the transmitance synoptic diagram that the utility model provides the camera module.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.

The utility model provides a kind of optical filter, comprises as the smalt of substrate and more than a slice and paired TiO ₂And SiO ₂Plated film, described paired TiO ₂And SiO ₂Plated film is pressed TiO ₂Plated film, SiO ₂Plated film, TiO ₂Plated film, SiO ₂Plated film ... order overlap described smalt and described paired TiO ₂And SiO ₂TiO in the plated film ₂Plated film is the company of subsides mutually; Described SiO ₂Plated film is that thickness is the plated film of 5.2 μ m, described TiO ₂Plated film is that thickness is the plated film of 0.2 μ m.

Because the utility model adopts SiO ₂The thickness of plated film is 5.2 μ m, TiO ₂The thickness of plated film is 0.2 μ m, in the structure miniaturization, makes that the IR-cut effect is strengthened.

Below in conjunction with specific embodiment realization of the present utility model is described in detail.

As shown in Figure 1, first embodiment that provides for the utility model.

The optical filter that this first embodiment provides is for being applied in the mobile phone cam, and certainly, it also can be applied in other device that needs infrared filtering.

The optical filter that this first embodiment provides comprises as the smalt 1 of substrate and more than a slice and paired TiO ₂Plated film 2 and SiO ₂Plated film 3, paired TiO ₂Plated film 2 and SiO ₂Plated film 3 is pressed TiO ₂Plated film 2, SiO ₂ Plated film 3, TiO ₂ Plated film 2, SiO ₂Plated film 3 ... order overlap smalt 1 and paired TiO ₂ Plated film 2 and SiO ₂TiO in the plated film 3 ₂Plated film 2 is the company of subsides mutually; SiO ₂The thickness of plated film 3 is 5.2 μ m, TiO ₂The thickness of plated film 2 is 0.2 μ m.

Above-mentioned paired TiO ₂ Plated film 2, SiO ₂ Plated film 3, TiO ₂ Plated film 2, SiO ₂Plated film 3 ... can be laminated to 40 layers; Can certainly be one deck TiO ₂Plated film 2 and one deck SiO ₂Plated film 3; Can determine lamination quantity according to actual needs.

The above-mentioned optical filter that provides, it is SiO ₂The thickness of plated film 3 is 5.2 μ m, TiO ₂The thickness of plated film 2 is 0.2 μ m, like this, and the SiO in compared to existing technology ₂The thickness of plated film 3 is 5 μ m, TiO ₂The thickness of plated film 2 is 0.3 μ m, has realized the effect of further IR-cut, makes the optical filter miniaturization simultaneously again.

In the present embodiment, the gross thickness of optical filter is 0.24-0.3mm; This has just guaranteed the miniaturization of installing space.

Further, as shown in Figure 2, the another side of smalt 1 also is provided with antireflecting film 4, certainly, uses and disuses antireflecting film, is specifically decided by actual conditions.

Adopt antireflecting film needing can to strengthen the permeability of the light of wavelength, can revise because the transmission that the thickness of smalt 1 reduces to cause-by the steepness of transition zone, make it satisfy the resolution requirement of imageing sensor.

Find in the practice with three layers of antireflecting film 4, can be under the situation that optical filter does not too thicken, reach preferable transmission-the end steepness of transition zone.

As shown in Figure 3, the camera that the utility model provides comprises imageing sensor 7, lens group 5, also comprises above-mentioned optical filter 6, and optical filter 6 is arranged between lens group 5 and the imageing sensor 7, and optical filter 6 is coated with TiO in pairs ₂Plated film, SiO ₂The one side of plated film is relative with imageing sensor 7; So just can guarantee that imageing sensor 7 can reliably respond to optical filter 6 and pass the light signal of coming; In the camera miniaturization, by optical filter 6 effective filtering near infrared lights, thereby promote the effect of taking pictures more effectively.

In the camera that the utility model provides, imageing sensor is ccd image sensor, also can be cmos image sensor; This is flexible configuration as the case may be.

The utility model also provides a kind of mobile phone that adopts above-mentioned camera to make because the camera optical filter that adopted utility model to provide, so when making the mobile phone miniaturization, effectively filtering near infrared light, thereby improve the cell-phone camera effect better.

Fig. 4 and shown in Figure 5, visible region 400-630nm is high saturating, and near infrared 700-1100nm ends; And see through-fine by the zone of transition steepness, be convenient to imageing sensor and differentiate.

The above only is preferred embodiments of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. optical filter is characterized in that: comprise as the smalt of substrate and more than a slice and paired TiO ₂And SiO ₂Plated film, described paired TiO ₂And SiO ₂Plated film is pressed TiO ₂Plated film, SiO ₂Plated film, TiO ₂Plated film, SiO ₂Plated film ... order overlap described smalt and described paired TiO ₂And SiO ₂TiO in the plated film ₂Plated film is the company of subsides mutually; Described SiO ₂Plated film is that thickness is the plated film of 5.2 μ m, described TiO ₂Plated film is that thickness is the plated film of 0.2 μ m.

2. optical filter as claimed in claim 1, it is characterized in that: described optical filter is that gross thickness is the optical filter of 0.24-0.3mm.

3. optical filter as claimed in claim 1 or 2, it is characterized in that: the another side of described smalt also is provided with antireflecting film.

4. optical filter as claimed in claim 3, it is characterized in that: described antireflecting film is 3 layers.

5. a camera comprises imageing sensor, lens group, it is characterized in that: also comprise each described optical filter of claim 1 to 4, described optical filter is arranged between described lens group and the described imageing sensor, and described optical filter is coated with described TiO in pairs ₂Plated film, SiO ₂The one side of plated film is relative with described imageing sensor.

6. camera as claimed in claim 5, it is characterized in that: described imageing sensor is ccd image sensor.

7. camera as claimed in claim 5 is characterized in that, described imageing sensor is cmos image sensor.

8. a mobile phone is characterized in that: comprise each described camera of claim 5 to 7.