Abstract: A photosensitive resin composition comprising: (A) a binder polymer; (B) a photopolymerizable compound that has an ethylenically unsaturated bond; and (C1) a compound represented by general formula (1) below, wherein, at least one R represents a C1-10 alkoxy group or a C1-12 alkyl group; the sum of a, b, and c is 1 to 6; and when the sum of a, b, and c is 2 to 6, each R may be the same as or different from one another.

Abstract: The photosensitive resin composition of the invention comprises (A) a photopolymerizing compound with two or more ethylenic unsaturated bonds in the molecule and (B) a photopolymerization initiator which initiates photopolymerization reaction of the (A) photopolymerizing compound, the photosensitive resin composition being characterized in that the molecule of the (A) photopolymerizing compound further contains a characteristic group with a bond which breaks when the (A) photopolymerizing compound is heated under temperature conditions of 130-250° C.

Abstract: The present invention is a photosensitive element including a support and a photosensitive resin composition layer composed of a photosensitive resin composition containing (A) a binder polymer, (B) a photopolymerizable compound, and (C) a photopolymerization initiator, wherein, the photosensitive resin composition contains a thioxanthone-based compound represented by the following general formula (I) as the component (C), and when the parts by weight of the thioxanthone-based compound relative to 100 parts by weight for the total weight of the component (A) and the component (B) is taken to be P, and the film thickness of the photosensitive resin composition layer is taken to be Q (?m), then R, which is the product of P and Q, satisfies the condition of the following formula (1). In the following general formula (I), R1 to R8 represent a hydrogen atom, halogen atom or hydrocarbon group. 25.5?R?79.

Abstract: Bi-directional and uni-directional optical communication and transmission modules minimize crosstalk during use by diffusing reflected and returned stray light. A bi-directional module includes a transmission optical element for transmitting light into the module, a reception optical element for receiving light in the module, an optical fiber for guiding light to and from the transmission and reception optical elements, respectively, a beam splitter for allotting light received from the transmission optical element and the optical fiber, and a light non-return chamber for receiving and diffusing stray light reflected by the beam splitter from the transmission optical element and the optical fiber. A uni-directional module includes a light non-return chamber for receiving and diffusing return light reflected by a beam splitter from at least one optical device arranged in the module.