CN2491831Y

CN2491831Y - Optical detector based on CMOS element plane imaging

Info

Publication number: CN2491831Y
Application number: CN 00203108
Authority: CN
Inventors: 鲍立威; 张宇明; 蔡颖; ***欣
Original assignee: 鲍立威
Priority date: 2000-01-31
Filing date: 2000-01-31
Publication date: 2002-05-15
Anticipated expiration: 2010-01-31

Abstract

Disclosed is an optical checkout gear based on the plane image formation of a CMOS component, a driving screw mandrel in a booth is rotated by a step motor, a lens assemblage sheath is driven to move up and down, the optimum image-forming distance is achieved by changing the distance between a to-be-checked optical lens and the CMOS component. Constant-current light source is through an optical grating board to form standard light signal which is then through the optical lens to form detection optical signal which is then switched into electrical signal through a CMOS circuit, and then the electrical signal is switched into digit signal through A/D and is processed by a computer, then main technical parameters of the optical lens are figured out, and the main technical parameters of the optical lens are displayed on a screen and meanwhile are memorized in a hardware. The utility model has the advantages that the measurement is easy and high-efficient, and high-accuracy detection is realized.

Description

Optical detection apparatus based on the cmos device planar imaging

The utility model relates to the measurement mechanism of optical lens technical parameter.

Optical lens is used on various fields and product more and more widely as the extension of human eye, and whether the technical parameter of optical lens the performance of having assembled this optical lens product that is directly connected to up to standard.Along with the development of cold processing technique, also more and more higher to the requirement of the technical parameter of optical lens.The method that is adopted in the detection of optical lens at present comprises: ocular estimate is promptly intuitively judged the quality of optical lens by visual inspection; Adopt the imaging of CCD device to carry out data processing and come technical parameter of detector lens or the like by microcomputer.Wherein a kind of method in back is comparatively advanced, but adopts the imaging of line style CCD device can't satisfy the requirement of high precision plane imaging, adopts then signal Processing complexity of area array CCD device.

The purpose of this utility model is: the optical detection apparatus based on the cmos device planar imaging of designing a kind of simple and effective.

The technical solution of the utility model is: it comprises mechanical hook-up, photoelectric conversion device and signal processing apparatus:

1) mechanical hook-up: be included in camera bellows stepper motor is housed outward, stepper motor is connected with drive lead screw in the camera bellows by adapter sleeve, the platform that can move up and down along the gathering sill of camera bellows both sides is housed on the drive lead screw, there is cmos device the platform below, the optical lens installation sleeve is housed in the deck hole, and the light source box of grating target is equipped with in the outer optical lens installation sleeve top of camera bellows;

2) photoelectric conversion device: comprise that by cmos device and photoelectric circuit be the cmos circuit of one, insert the PC bus of microcomputer through the A/D change-over circuit; Stepper motor inserts the parallel port of microcomputer through stepping motor control circuit, circuit interface;

3) signal processing apparatus: comprise a microcomputer, its circuit interface is the parallel port of microcomputer, and the A/D change-over circuit inserts the PC bus of microcomputer.

Cmos circuit adopts the CMOS planar imaging device and the integrated optronic circuit board thereof of Hewlett-Packard, and stepper motor adopts P2H type stepper motor and supporting control circuit 6410 type servo-drivers thereof; The A/D change-over circuit adopts and grinds the magnificent 818-HG of company plate; The grating target is circular or square standard grid target.

The advantage that the utlity model has is: carry out the technical parameter that planar imaging comes the detection optical camera lens with cmos device, and deposit hard disk in when these technical parameters can be shown on display, measure easy, efficient and can realize high Precision Detection.

Below in conjunction with accompanying drawing the utility model is further described.

Description of drawings:

Fig. 1 is a mechanical device structure synoptic diagram of the present utility model;

Fig. 2 is photoelectric conversion device figure of the present utility model;

Fig. 3 is a detection principle flow chart of the present utility model.

As shown in Figure 1, mechanical hook-up is included in the camera bellows 9 outer stepper motors 2 that are equipped with, stepper motor 2 is connected by the drive lead screw 3 in adapter sleeve and the camera bellows 9, the platform 4 that can move up and down along the gathering sill 8 of camera bellows 9 both sides is housed on the drive lead screw 3, on the cmos device fixed support 6 below the platform 4 cmos device 7 is housed, platform is equipped with optical lens installation sleeve 10 in 4 holes, and the light source box 1 of grating target 12 is equipped with in camera bellows 9 outer optical lens installation sleeve 10 tops, and camera bellows 9 bottom surfaces are support 5.

As shown in Figure 2, photoelectric conversion device comprises by cmos device 7 and photoelectric circuit 14 and be the cmos circuit 15 of one, through the PC bus of A/D change-over circuit 13 access microcomputers; Stepper motor 2 inserts the parallel port of microcomputer through stepping motor control circuit 16, circuit interface 17.

Signal processing apparatus comprises a microcomputer, and its circuit interface is the parallel port of microcomputer, and the A/D change-over circuit inserts the PC bus of microcomputer.

It detects principle: cmos circuit 15 can adopt the CMOS planar imaging device and the integrated optronic circuit board thereof of Hewlett-Packard, tested detection optical camera lens 11 is placed in the hole of camera lens installation sleeve 10 upper ends, the lower end of camera lens installation sleeve 10 is contained in the hole of platform 4, stepper motor 2 is under the control of microcomputer effect, drive by stepping motor control circuit, driving drive link 3 through adapter sleeve rotates, the platform 4 of drive lead screw 3 through matching with it, platform 4 is moved up and down in the gathering sill 8 of camera bellows 9, change the distance between detected optics camera lens 11 and the cmos device, also just changed the back focal length of camera lens, moving up and down of camera lens 11 can be found best image-forming range in the process after, stepper motor 2 stopped operating.Wherein stepper motor can adopt P2H type stepper motor and supporting control circuit 6410 type servo-drivers thereof, also can use other models.As shown in Figure 3, at this moment the permanent light source of the direct current in the light source box 1 is through grating target 12, form the standard light signal, after detected optics camera lens 11 conversion, form sensed light signal, sensed light signal is converted to electric signal through cmos circuit 15, electric signal is transformed to digital signal through A/D change-over circuit 13, numeral is handled by micro-signal machine 18, according to these data, microcomputer 18 calculates the important technological parameters of optical lens, comprises enlargement ratio and optical transfer function, and these technical parameters are shown in display 19, deposit hard disk 20 simultaneously in, so just realized high precision fast detecting the optical lens technical parameter.

Claims

1. based on the optical detection apparatus of cmos device planar imaging, it is characterized in that it comprises mechanical hook-up, photoelectric conversion device and signal processing apparatus:

1) mechanical hook-up: be included in the outer stepper motor [2] that is equipped with of camera bellows [9], stepper motor [2] is connected by the interior drive lead screw [3] of adapter sleeve and camera bellows [9], the platform [4] that can move up and down along the gathering sill [8] of camera bellows [9] both sides is housed on the drive lead screw [3], cmos device [7] is arranged below the platform [4], platform [4] is equipped with optical lens installation sleeve [10] in the hole, and the light source box [1] of grating target [12] is equipped with in outer optical lens installation sleeve [10] top of camera bellows [9];

2) photoelectric conversion device: comprise by cmos device [7] and photoelectric circuit [14] being the cmos circuit of one [15], insert the PC bus of microcomputer through A/D change-over circuit [13]; Stepper motor [2] inserts the parallel port of microcomputer through stepping motor control circuit [16], circuit interface [17];

2. the optical detection apparatus based on the CMOS planar imaging according to claim 1, it is characterized in that: cmos circuit [15] is the CMOS planar imaging device and the integrated optronic circuit board thereof of Hewlett-Packard, and stepper motor [2] is P2H type stepper motor and supporting control circuit 6410 type servo-drivers thereof; A/D change-over circuit [13] is for grinding the magnificent 818-HG of company plate; Grating target [12] is circular or square standard grid target.