Imaging apparatus for fully automatic screen printer

Abstract

An imaging apparatus for fully automatic screen printer including two stacked light sources, two stacked beamsplitters, two stacked optical reflectors, two stacked imaging lens and two stacked image sensors, wherein the two stacked optical reflectors and the two stacked light sources are correspondingly disposed on two different sides of the two beamsplitters, the two stacked imaging lens are disposed on another side of the beamsplitters different from that of the optical reflectors and the light sources, the two stacked image sensors are disposed behind the imaging lens; the optical reflectors are provided with an upward reflection plane and a downward reflection plane, the optical axes of the imaging lenses are orthogonal to that of the light sources. The imaging apparatus is of two independent optical paths which capture the image of the printed circuit board and that of the screen respectively. Furthermore, the imaging apparatus is of compact structure, high acquiring speed and optical paths easy to be adjusted.

1 . An imaging apparatus for fully automatic screen printer including
 two stacked light sources, two stacked beamsplitters, two stacked optical reflectors, two stacked imaging lens and two stacked image sensors,   wherein the two stacked optical reflectors and the two stacked light sources are correspondingly disposed on two different sides of the two beamsplitters, the two stacked imaging lens are disposed on another side of the beamsplitters different from that of the optical reflectors and the light sources, the two stacked image sensors are disposed behind the imaging lens; the optical reflectors are provided with an upward reflection plane and a downward reflection plane, the optical axes of the imaging lenses are orthogonal to that of the light sources, and   wherein the two stacked optical reflectors and the two stacked light sources are disposed on two opposite sides of the two beamsplitters, the imaging apparatus forms a T-shaped structure.   
     
     
         2 . The imaging apparatus for fully automatic screen printer according to  claim 1 , wherein the angles of the light-splitting planes of the beamsplitters with respect to the axes of the imaging lenses and the axes of the light source are both 45°. 
     
     
         3 . The imaging apparatus for fully automatic screen printer according to  claim 1 , wherein the beamsplitter is formed of two right angular prisms. 
     
     
         4 . The imaging apparatus for fully automatic screen printer according to  claim 1 , wherein the beamsplitter is formed of one or two light-splitting plates. 
     
     
         5 . The imaging apparatus for fully automatic screen printer according to  claim 1 , wherein the optical reflector is formed of an isosceles right angle prism or two reflection lens or a right angle prism with two reflection planes. 
     
     
         6 . The imaging apparatus for fully automatic screen printer according to  claim 1 , wherein the image sensor is formed of an analog or digital CCD camera or CMOS camera. 
     
     
         7 . The imaging apparatus for fully automatic screen printer according to  claim 1 , wherein it further includes a ring light source, the ring light source is formed of a LED ring light source between a printed circuit board and the optical reflector in order to provide lateral illumination for the printed circuit board, the beam of light reflected downwards by the optical reflector travels through the central hole of the ring light source and then irradiates on the printed circuit board. 
     
     
         8 . The imaging apparatus for fully automatic screen printer according to  claim 1 , wherein the light source and the image sensor are connected to the camera controller of the image acquiring control and processing device so as to control the switching of the light source and accordingly control the image acquiring of the screen and the printed circuit board; and
 the video signal output end of the image sensor is connected to the image acquiring card of the image acquiring control and processing device, so as to convert the acquired image video signals into digital signals.