Rectangular monobloc optical lens and manufacturing method thereof

Abstract

A rectangular monobloc optical lens and a manufacturing method thereof are disclosed. A monobloc optical lens includes a rectangular surround and a central mirror-surface area. The rectangular surround is mounted inside a clipping part of a lens holder. The central mirror-surface area consists of a convex aspherical surface and a concave aspherical surface while the convex aspherical surface faces an image side and the concave aspherical surface faces an object side. The manufacturing method includes the steps of: cutting a sheet made from glass material into a plurality of rectangular sheet units; then setting the rectangular sheet unit into a mold for lens for hot pressing. Thereby, the manufacturing process is simplified and the cost is reduced. Moreover, the lens has high resolution and the volume of the lens is effectively reduced so as to increase the applications of the lens.

1 - 9 . (canceled)  
   
   
       10 . A method for manufacturing a rectangular monobloc optical lens comprising steps of: 
 cutting a sheet made from glass material into a plurality of rectangular sheet units and each rectangular sheet unit having homogeneous thickness as the glass plate;    providing a mold for lens in which central part of an upper mold and a lower mold is disposed with an aspherical concave mold surface and an aspherical convex mold surface respectively, corresponding to each other and a mold cavity is arranged on circumference of the aspherical concave mold surface or the aspherical convex mold surface;    setting the rectangular sheet unit in center of the mold for hot pressing so as to make center of the rectangular sheet unit form a concave aspherical surface and a convex aspherical surface by the aspherical concave mold surface and the aspherical convex mold surface of the mold; the concave aspherical surface and the convex aspherical surface form a central mirror-surface area of the lens; periphery of the rectangular sheet unit is pressed inside the mold cavity and is extended outward so as to form a rectangular surround of the lens;    releasing the molded lens from the mold.    
   
   
       11 . The method as claimed in  claim 10 , wherein thickness of the glass material is 0.40 mm.  
   
   
       12 . The method as claimed in  claim 10 , wherein side length of the rectangular sheet unit is 1.70 mm.  
   
   
       13 . The method as claimed in  claim 11 , wherein side length of the rectangular sheet unit is 1.70 mm.  
   
   
       14 . The method as claimed in  claim 10 , wherein the mold cavity is a round cavity with diameter of 2.5 mm.  
   
   
       15 . The method as claimed in  claim 10 , wherein depth of the mold cavity is 0.319 mm.  
   
   
       16 . The method as claimed in  claim 15 , wherein depth of the mold cavity is 0.319 mm.