Patent ID: 11968971
Assignee: JAPAN TOBACCO INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC A  Y | IPC A

Claim 0:
1. A light source device for trapping indoor adult Phycitinae, which is an adult moth belonging to subfamily Phycitinae, the device being configured to: emit an attracting light at a predetermined photon flux density; and form a guide path by the attracting light to guide the adult Phycitinae to a vicinity of an emission end of the attracting light in a region having a photon flux density lower than the predetermined photon flux density on a side lower than a height of the emission end of the attracting light; form a behavior suppression region configured to suppress the adult Phycitinae behavior with the emission end of the attracting light formed by the attracting light in which a value of the photon flux density of the attracting light is equal to or greater than the value of the photon flux density of the attracting light in the guide path; and form a behavior suppression boundary (IB) formed by the attracting light which is deviated from an optical axis of the light source device (10) by a predetermined angle or more, the behavior suppression region being on an upper side of the behavior suppression boundary (IB1), and the guide path being on a lower side of the behavior suppression boundary (IB1), so as to trap the adult Phycitinae attracted by the attracting light in the guide path, wherein the photon flux density d [photons/m2/s] of the attracting light in the guide path satisfies a relationship expressed by:

0<d<20×1014, and wherein an angle, formed by an optical axis of a light source (11) is set as follows: wherein when the angle formed by the optical axis of the light source and the behavior suppression boundary (IB) is defined as a light distribution angle (θ/2) of the light source (11), the light source (11) is configured to emit the attracting light having a narrow-angle light distribution angle (θn/2),
wherein the narrow-angle light distribution angle (θn/2) of the emitted attracting light is an angle in a range that satisfies a relationship of L×tan (θn/2)<H,
wherein L is a distance at which the value of the photon flux density of the attracting light emitted at a predetermined photon flux density attenuates to a value less than the behavior suppression light amount in the atmosphere, and
wherein H is a height of the emission end of the light source.