Abstract: An infrared LED comprising an insulating film formed on an element and a microlens formed on the insulating film, wherein the insulating film and the microlens are formed using radiation-sensitive resin compositions each containing a cyclic olefin polymer (A) having a protonic polar group, a radiation-sensitive compound (B), and a cross-linking agent (C), is provided.

Abstract: An infrared LED comprising an insulating film formed on an element and a microlens formed on the insulating film, wherein the insulating film and the microlens are formed using radiation-sensitive resin compositions each containing a cyclic olefin polymer (A) having a protonic polar group, a radiation-sensitive compound (B), and a cross-linking agent (C), is provided.

Abstract: Provided are a method for producing a circular polarization separation sheet and an apparatus for coating layer formation, whereby a circular polarization separation sheet which selectively reflects a light in an entire visible light range is easily obtainable. A method for producing a circular polarization separation sheet including a step of obtaining on a substrate a photopolymerizable composition containing a liquid crystal compound, and a step of converting the coating layer into a resin layer having a cholesteric regularity, characterized in that the resin layer forming step includes: a selected ultraviolet light irradiation step (1) of irradiating the coating layer with a selected ultraviolet light having an illumination intensity of less than 10 mW/cm2 under a temperature at 20 to 40° C. for 0.