CN202102160U

CN202102160U - Automatic aperture with light-filtering function

Info

Publication number: CN202102160U
Application number: CN2011202033497U
Authority: CN
Inventors: 吴富宝
Original assignee: Xiamen Leading Optics Co Ltd
Current assignee: Xiamen Leading Optics Co Ltd
Priority date: 2011-06-16
Filing date: 2011-06-16
Publication date: 2012-01-04
Anticipated expiration: 2021-06-16

Abstract

The utility model discloses an automatic aperture with a light-filtering function. The automatic aperture comprises a shell, a diaphragm, a diaphragm driving motor, an optical filter and an optical filter driving motor, wherein a light transmitting hole is formed in the middle of the shell; both the diaphragm driving motor and the optical filter driving motor are mounted outside the shell; the diaphragm is mounted in the shell, can cover the light transmitting hole of the shell, and is connected with the driving shaft of the diaphragm driving motor; the optical filter comprises a light-filtering part, a fully light-transmitting part and a connecting part, and the thickness of the light-filtering part is the same as that of the fully light-transmitting part; the optical filter is arranged behind the diaphragm; the connecting part of the optical filter is connected with the driving shaft of the optical filter driving motor; in the light-filtering process, the light-filtering part of the optical filter covers the light transmitting hole of the shell; when light-filtering is not conducted, the fully light-transmitting part covers the light transmitting hole of the shell; and preferably, the optical filter driving motor is a solenoid valve type motor. When mounted on a lens, the automatic aperture ensures that the total optical length of the lens is unchanged, and the lens can not be out of focus.

Description

The auto iris that has filtering functions

Technical field

The utility model relates to auto iris manufacturing technology field, especially a kind of auto iris that has filtering functions.

Background technology

In the camera technique field; People's known wavelength is that the light of 320nm-760nm is visible light, and wavelength is invisible greater than the infrared light people of 760nm, when the video camera with infrared function is used for all weather surveillance video recording; If let wavelength be carried out to picture in the time of by day greater than the Sensor section that the infrared light of 760nm also gets into video camera; Will interference images, cause color distortion, if but this part infrared pick-up machine greater than 760nm of filtering just loses night vision function; Therefore a filtering apparatus need be set in the sensor front of video camera, filter in the time of daytime, the filtering wavelength does not filter in the time of evening greater than the infrared light of 760nm, lets wavelength pass through greater than the infrared light of 760nm.

Disclosing a patent No. on Dec 29th, 2010 is that ZL201020159160.8, name are called the utility model patent of " a kind of automatic switching control equipment that is applied to the optical filter of video camera ", and its main technical scheme is to be connected with optical filter through a rotating mechanism, and rotating mechanism is controlled by control assembly; In the time will filtering; Control assembly rotates rotating mechanism, and optical filter covers the light hole of camera lens, and the filtering wavelength is greater than the infrared light of 760nm; When not filtering; Control assembly is by the rotating mechanism return, and optical filter is return the light hole that does not cover camera lens, lets wavelength pass through greater than the infrared light of 760nm; But this structure is because optical filter has certain thickness, and the optics length overall of camera lens can change when filtering and not filtering, and it is burnt to cause camera lens to lose, and influences the acquisition quality of image.

The utility model content

The technical matters that the utility model will solve provides a kind of auto iris that has filtering functions, can guarantee when being contained on the camera lens that the optics length overall of camera lens does not change, and does not lose Jiao.

For achieving the above object, the technical scheme of the utility model is: a kind of auto iris that has filtering functions comprises housing, diaphragm, diaphragm CD-ROM drive motor, optical filter, optical filter CD-ROM drive motor; The middle part of housing is provided with light hole, and diaphragm CD-ROM drive motor and optical filter CD-ROM drive motor are contained in the outside of housing, and diaphragm is contained in the light hole of the interior also ability of housing covering shell; Diaphragm is connected through the driving shaft of connecting rod and CD-ROM drive motor; Optical filter comprises the optical filtering part, full impregnated light part and a coupling part, and the optical filtering part of optical filter is identical with full impregnated light segment thickness; Optical filter is arranged on the back of diaphragm; The coupling part of optical filter is connected the light hole of the optical filtering part covering shell of optical filter during optical filtering, the light hole of the full impregnated light part covering shell of optical filter when not filtering through connecting rod with the driving shaft of optical filter CD-ROM drive motor.

The motor that preferred described optical filter CD-ROM drive motor is an electromagnetic type makes that the switching of optical filter is reliable more, quick.

When the utility model was in the optical filtering state, the light hole of housing was that the optical filtering by optical filter partly covers, and is in when not filtering state; The light hole of housing is that the full impregnated light by optical filter partly covers, because the optical filtering of optical filter part is identical with full impregnated light segment thickness, so can not influence the optics length overall of camera lens; Make when the utility model is contained on the camera lens; No matter be in the optical filtering state or be in the state of not filtering, the optics length overall of camera lens does not change, and guarantees that camera lens does not lose Jiao.

Description of drawings

Fig. 1 is the utility model front view.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the rear view of Fig. 1.

Fig. 4 is the utility model optical filter front view.

Fig. 5 is that the utility model is in the optical filtering view.

Fig. 6 is that the utility model is in the view that do not filter.

Embodiment

Below in conjunction with accompanying drawing and concrete embodiment the utility model is done further explain.

Fig. 1 is to shown in Figure 4; A kind of auto iris that has filtering functions comprises housing 1, diaphragm 2, diaphragm CD-ROM drive motor 3, optical filter 4, optical filter CD-ROM drive motor 5, and the middle part of housing 1 is provided with light hole 11; Diaphragm CD-ROM drive motor 3 and optical filter CD-ROM drive motor 5 are contained in the outside of housing 1; Diaphragm 2 is contained in the light hole 11 of housing 1 interior also ability covering shell 1, and diaphragm 2 is connected through the driving shaft of connecting rod 31 and CD-ROM drive motor 3, and optical filter 4 comprises optical filtering part 41; Full impregnated light part 42 and a coupling part 43; The optical filtering part 41 of optical filter 4 is identical with full impregnated light part 42 thickness, and optical filter 4 is arranged on the back of diaphragm 2, and the coupling part 43 of optical filter 4 is connected with the driving shaft of optical filter CD-ROM drive motor 5 through connecting rod 51.

Described optical filter CD-ROM drive motor 5 optional motors with electromagnetic type.

In conjunction with shown in Figure 5, optical filter 4 is driven through connecting rod 51 by optical filter CD-ROM drive motor 5 and moves down, and the light hole 11 of optical filtering part 41 covering shells 1 of optical filter 4 filters out the invisible light part, is in the optical filtering state, prevents the distortion of color when use daytime.

In conjunction with shown in Figure 6; Optical filter 4 is driven up through connecting rod 51 by optical filter CD-ROM drive motor 5 and moves, and the light hole 11 of full impregnated light part 42 covering shells 1 of optical filter 4 makes all light to pass through; Be in the state of not filtering; Also can use when making video camera at night, guarantee that simultaneously the optics length overall of camera lens does not change, guarantee not lose Jiao.

The above only is preferred embodiment of the utility model, and the change that those skilled in the art does to be equal to by claim all falls into the protection domain of this case.

Claims

1. an auto iris that has filtering functions comprises housing, diaphragm, diaphragm CD-ROM drive motor, optical filter, optical filter CD-ROM drive motor, and it is characterized in that: the middle part of housing is provided with light hole; Diaphragm CD-ROM drive motor and optical filter CD-ROM drive motor are contained in the outside of housing; Diaphragm is contained in the light hole of the interior also ability of housing covering shell, and diaphragm is connected through the driving shaft of connecting rod and CD-ROM drive motor, and optical filter comprises the optical filtering part; Full impregnated light part and a coupling part; The optical filtering part of optical filter is identical with full impregnated light segment thickness, and optical filter is arranged on the back of diaphragm, and the coupling part of optical filter is connected with the driving shaft of optical filter CD-ROM drive motor through connecting rod; The light hole of the optical filtering part covering shell of optical filter during optical filtering, the light hole of the full impregnated light part covering shell of optical filter when not filtering.

2. the auto iris that has filtering functions according to claim 1 is characterized in that: described optical filter CD-ROM drive motor is the motor of electromagnetic type.