PRODUCTION OF MICROLENS

• Main Authors: KOGA OSAMU, ISHIMATSU TADASHI, KITAMURA TOMOHITO
• Format: Patent
• Language: English
• Published: 08.06.1999
• Edition: 6
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PERFORMING OPERATIONS; PHYSICS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To improve the condensing efficiency of a microlens while enhancing the transmissivity thereof by forming the cross-sectional shape of the surface of the microlens into a more circular arc shape. SOLUTION: After the pattern 4 of a photosensitive resin is irradiated with UV rays, the pattern is heated to form a microlens 5. Further, a positive type photosensitive resin using a novolac resin is used. The irradiation quantity of UV rays is 14-20 mg/cm per 1 μm of the film thickness of the photosensitive resin and the heating temp. of the pattern is made higher than the m.p. of the photosensitive resin by 10-20 deg.C.