Patent ID: 8873019

Claim:
A manufacturing device of a birefringent lens grating, the manufacturing device comprising: an object table for supporting the birefringent lens grating, wherein the birefringent lens grating includes a lens array substrate having a plurality of cylindrical grooves parallel to each other and a liquid crystal material layer contacting with the lens array substrate by filling into the plurality of cylindrical grooves; a curing radiation source for curing the liquid crystal material layer of the birefringent lens grating; a temperature regulator for regulating a curing temperature of the liquid crystal material layer; a projection pattern comprising an array of transmitting lines having a line pitch and a line width and disposed adjacent to the birefringent lens grating corresponding to the plurality of cylindrical grooves of the lens array substrate; an illuminating light source for projecting light onto the projection pattern, passing through the array of transmitting lines, and onto the birefringent lens grating; an image capturing device for capturing the light out from the birefringent lens grating and obtaining a projection pattern image of the projection pattern; and a controller for comparing an image width of the projection pattern image of the array of transmitting lines of the projection pattern with the line width of the transmitting lines to control the temperature regulator to regulate the curing temperature for the liquid crystal material layer according to the comparison of the image width of the projection pattern image with the line width of the transmitting lines.