A kind of optical zoom camera with USB interface
Technical field
The utility model relates to the camera technology, particularly a kind of optical zoom camera with USB interface.
Background technology
At present, the application that the small-sized image pickup head of USB interface obtains instrument as video more and more widely, it mainly is connected with computing machine or other digital products by USB interface, can realize purposes such as video capture, Video chat, video conference, videophone.The structure of existing this camera is mainly by singly burnt optical lens and CMOS or ccd image sensor connect and compose, its action principle is that light signal sees through optical lens and is projected to imageing sensor, by after the imageing sensor sensitization light signal being converted into electric signal, handling electric signal by computing machine or other digital products then and show video; The major defect that existing this camera exists is: the focal length of optical lens is fixed, can't carry out optical zoom like this, thereby for this camera, when reference object and one timing of camera distance, the optical imagery size just can not change, that is the scene size can not change; The circuit of the camera that has has electronics and becomes function doubly, but, electronics doubly adopt computing machine interpolate value algorithm to realize because becoming, so it also regulates just analog regulation to the imaging convergent-divergent, diminishes picture quality, can not realize the true effect that optical zoom is regulated.
The utility model content
The purpose of this utility model is to overcome the shortcoming of prior art, but focal adjustment when a kind of object imaging to different distance is provided guarantees that image quality is stable, simple to operate, the optical zoom camera of band USB interface easy to use.
The purpose of this utility model is achieved through the following technical solutions: the optical zoom camera of this band USB interface comprises optical lens, CMOS or ccd image sensor assembly (containing CMOS or ccd image sensor, signal circuit, imput output circuit), USB interface, it is characterized in that: described optical lens is a zoom lens.
Described zoom lens comprises change times assembly, compensation assembly.Described change times assembly, the coaxial setting of compensation assembly also are connected with relative zoom adjusting part simultaneously.Described change times assembly is arranged to become in times support tube by Zoom lens and constitutes; Described compensation assembly is arranged in the compensation support tube by offset lens and constitutes.
Described zoom lens also can comprise focusing component, and described focusing component is arranged at and becomes times assembly one side or be arranged at compensation assembly one side.
Described relative zoom adjusting part can be hand structure or electrodynamic type structure; Its hand structure comprises change times rotating cylinder, main tube, guide pin, and a described change times rotating cylinder is socketed on outside the main tube, is connected with master's tube is rotatable, and main barrel has guide hole, becomes times rotating cylinder and is connected with change times assembly and compensation assembly simultaneously by the guide pin that is positioned at guide hole.
The guide hole of described main barrel is the spiral guide hole, and a described change times rotating cylinder inboard has axial channel, becomes times rotating cylinder and is connected with change times assembly and compensation assembly simultaneously by the guide pin that is positioned at described axial channel and spiral guide hole simultaneously; By becoming the rotation of times rotating cylinder, its axial channel is stirred guide pin and is moved along the spiral guide hole of main barrel, and the change that is connected with guide pin times assembly and compensation assembly also move axially along main tube simultaneously, thereby carry out zoom.
The guide hole of described main barrel also can be axial straight hole, and the medial surface of described change times rotating cylinder is provided with helical guide groove, becomes times rotating cylinder and is connected with change times assembly and compensation assembly simultaneously by the guide pin that is positioned at described helical guide groove and axial straight hole simultaneously; By becoming stirring of times rotating cylinder, its helical guide groove is stirred guide pin and is moved along the axial straight hole of main barrel, and the change that is connected with guide pin times assembly and compensation assembly also move simultaneously vertically, thereby carry out zoom.
Described focusing component comprises focusing lens, focusing support tube, outer seal, and the focusing support tube is threaded with main tube, and outer seal is threaded with the focusing support tube, and focusing lens is pressed abd fixed in the focusing support tube.
Action principle of the present utility model is: the optical zoom camera of this band USB interface is taken by zoom lens, and when picture was determined, the scene size that is ingested changed with lens focus; Focal length is big, and the scene domain that is ingested is little, and scene image is big; Otherwise focal length is little, and the scene domain that is ingested is big, and scene image is little; In the focal length change process, image quality is constant.
The relative prior art of the utility model has following advantage and effect: the optical zoom camera of this band USB interface has increased optical zoom function on the camera basis of existing band USB interface, reference object blur-free imaging that can be different to distance, the shooting effect that makes camera is near relatively large video camera shooting effect, shooting quality with respect to existing camera is greatly improved, also significantly better than the shooting effect with electronics change camera doubly.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Embodiment
Fig. 1 shows concrete structure of the present utility model, as seen from Figure 1, the optical zoom camera of this band USB interface comprises shell 1, focusing component 2, main tube 3, becomes times rotating cylinder 4, guide pin 5, becomes times assembly 6, compensation assembly 7, ccd image sensor assembly (containing ccd image sensor, signal circuit, imput output circuit) 8, USB interface 9 (containing USB output line and plug); Main tube 3, change times rotating cylinder 4, change times assembly 6, compensation assembly 7, ccd image sensor 8 are positioned at shell 1, shell 1 is stretched out in the end that becomes times rotating cylinder 4, focusing component 2 is positioned at the opening part of shell 1, main tube 3 one ends are threaded with focusing component 2, and the other end is oppositely arranged with the ccd image sensor 8 that is fixed in the shell 1 by support bar 10.Becoming times rotating cylinder 4 is socketed on outside the main tube 3, with main tube 3 rotatable being connected, the wall of main tube 3 has spiral guide hole 3-1, the medial surface that becomes times rotating cylinder 4 is provided with axial channel 4-1, described guide pin 5 is positioned at spiral guide hole 3-1 and axial channel 4-1 simultaneously, two guide pins 5 are fixedlyed connected with change times assembly 6 and compensation assembly 7 respectively, become times rotating cylinder and are connected with the change times assembly 6 and the compensation assembly 7 that are positioned at the coaxial setting of main tube simultaneously by two guide pins 5.Described change times assembly 6 is arranged to become in times support tube 6-2 by Zoom lens 6-1 and constitutes; Described compensation assembly 7 is arranged in the compensation support tube 7-2 by offset lens 7-1 and constitutes; Described focusing component 2 comprises focusing lens 2-1, focusing support tube 2-2, outer seal 2-3, and focusing support tube 2-2 is threaded with main tube 3, and outer seal 2-3 is threaded with focusing support tube 2-2, and focusing lens 2-1 is pressed abd fixed in the focusing support tube 2-2; Ccd image sensor 8 is connected by the connecting line USB interface 9 outer with being positioned at shell 1, also is provided with installing port 1-1 in shell 1 bottom, can be connected with the external support bar by installing port 1-1, and this camera is fixed.
The action principle of the optical zoom camera of this band USB interface is: become times rotating cylinder 4 by stirring with hand, change times assembly 6 and compensation assembly 7 are moved simultaneously, change distance between the two, realize optical zoom, regulate the position of focusing component 2 on main tube 3 according to the reference object of diverse location simultaneously, can be to the reference object blur-free imaging.