Abstract: A microlens is provided with opposite sides thereof each having an aspheric-surface shape. The microlens is configured such that a lens layer having an aspheric-surface shape is provided on each opposite side of the microlens, an optical communication module may be miniaturized and integrated as a working distance (WD) is minimized to 0.160±0.05 mm, and collimating performance is excellent as a value obtained by calculating a paraxial radius (R1) of a first lens layer over a paraxial radius (R2) of a second lens layer is 1.8 to 3.5.

Abstract: A microlens array according to an embodiment of the present disclosure includes lens layers with a first side thereof having aspheric-surface shapes. The microlens array is configured such that an optical communication module may be miniaturized and integrated as a working distance (WD) is minimized to 1.30±0.05 mm, and collimating performance is excellent as a curvature radius (R1) of each lens layer is 1.1 to 1.5.

Abstract: A method of manufacturing an optical multiplexer, whereby one molded product is formed by using a mold and vertically cut in a row direction, thus efficiently manufacturing multiple optical multiplexers, with a microlens array and an optical block being integrated together. Therefore, the present invention may increase product productivity and realize a size reduction of a product.

Abstract: Disclosed are a lens module for an endoscope and an endoscope using the same. The lens module includes: a case that is shaped as a tube and has a holding space formed therein, and a plurality of lenses arranged inside the case; wherein the plurality of lenses include a first lens and a second lens that are positioned adjacently and are separated by a particular distance in-between; and the first lens comprises a first forward-direction protrusion protruding towards the second lens from an edge region of a radial direction, with the first forward-direction protrusion formed as an integrated body with the first lens to control the distance between the first lens and the second lens. Thus, the lens module can be fabricated by sequentially inserting the lenses without having to insert a separate spacer or form a step or curb in the inner wall of the case.

Abstract: A method of manufacturing a microarray lens having a plurality of microlenses includes preparing a substrate having a plurality of depressions on a side, and forming a lens layer corresponding to shapes of the depressions by depositing a lens raw material on the side of the substrate on which the depressions are formed. The method is able to form a plurality of depression in precise aspheric shapes on a substrate and to easily adjust or change the number and the gaps of lenses by forming depressions on a substrate using a probe and depositing a lens layer on the substrate with the depressions.