Manufacturing method of lens array
AssigneeSeiko Epson Corporation
InventorMotoyuki Fujimori
Life of this patent
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Abstract
Molten glass (G) is set and press-molded in a molding die (60) having dies (621A1, 621A2) corresponding to a lens array. After the molding, the molded article is removed from the molding die (60) and separated by bending at a bend-separation face (121C), which is a boundary part of adjacent lens arrays, so that two lens arrays are produced.
Claims6
A method for manufacturing a lens array including a base with a shape of substantially rectangular plate, and a dome-shaped lens section formed on one face of the base and having a plurality of small lenses, the method comprising:
- press-molding a molten optical material in a molding die in which a plurality of dies corresponding to the lens array are formed to form a molded article in which a plurality of lens arrays are integrated;
- removing the molded article from the molding die after the press-molding;
- and
- separating adjacent lens arrays by bending at a boundary thereof,
- wherein dies corresponding to 2×(1+n) sets of the lens array are formed in the molding die, and the dies are arranged in a matrix of 2 rows×(1+n) columns, wherein n represents 0 or 1,
- wherein a projection is formed along a boundary between the dies at a bend separation face,
- wherein the dies have a step that is projected or recessed at a boundary between the rows spanning respectively over two of the dies arranged in columns, and
- wherein, in the press molding, at least two lateral faces, excluding the bend-separation face separated by bending the lens arrays, are press-molded as external position reference faces and a recess or a protrusion is formed by the step on one side of the base spanning over the boundary of adjacent ones of the lens arrays at the bend separation face.
A method for manufacturing a lens array including a base with a shape of substantially rectangular plate, and a dome-shaped lens section formed on one face of the base and having a plurality of small lenses, the method comprising:
- press-molding a molten optical material in a molding die in which a plurality of dies corresponding to the lens array are formed to form a molded article in which a plurality of lens arrays are integrated;
- removing the molded article from the molding die after the press-molding;
- and
- separating adjacent lens arrays by bending at a boundary thereof, the boundary being a recess formed by a projection in the molding die during the press-molding,
- wherein dies corresponding to 2×(1+n) sets of the lens array are formed in the molding die, and the dies are arranged in a matrix of 2 rows×(1+n) columns, wherein n represents 0 or 1,
- wherein a projection is formed along a boundary between the dies at the bend separation face,
- wherein the dies have a step that is projected or recessed at a boundary between the rows spanning respectively over two of the dies arranged in columns, and
- wherein, in the press molding, at least two lateral faces, excluding the bend-separation face separated by bending the lens arrays, are press-molded as external position reference faces and a recess or a protrusion is formed by the step on one side of the base spanning over the boundary of adjacent ones of the lens arrays at the bend separation face.
Dependencies are inferred from the claim text.