Abstract: A light emitting device includes a substrate with a circuit incorporated in the substrate, an interposer having a circuit connected to the circuit of the substrate, a light emitting element disposed on the interposer, a transmissive component disposed positioned to the light emitting element, and a frame body having an opening in which the transmissive component is disposed. The light emitting device further includes a ring-shaped body that encompasses the frame body on the substrate, and a sealant making the substrate and the ring-shaped body tightly contact one another. The frame body is disposed so as to encompass the light emitting element on the substrate. This provides the light emitting device with waterproof function.

Abstract: A light emitting device includes a substrate with a circuit incorporated in the substrate, an interposer having a circuit connected to the circuit of the substrate, a light emitting element disposed on the interposer, a transmissive component disposed positioned to the light emitting element, and a frame body having an opening in which the transmissive component is disposed. The light emitting device further includes a ring-shaped body that encompasses the frame body on the substrate, and a sealant making the substrate and the ring-shaped body tightly contact one another. The frame body is disposed so as to encompass the light emitting element on the substrate. This provides the light emitting device with waterproof function.

Abstract: An ultraviolet light emitting device of the present invention includes a light emitting element provided on a substrate, an optical system provided at a position facing the light emitting element, a metal cylinder holding the optical system, and a holding component holding the metal cylinder on a substrate. Light the emitting element is disposed in an area of the substrate, the area surrounded by one end of the metal cylinder closer to the substrate. This provides the ultraviolet light emitting device that prevents the distortion of the optical system as well as the influence of ultraviolet light on the holding component.

Abstract: A diffractive optical element includes a base having, on a surface, a first region with a diffraction grating and a second region located on an outer side of the first region, and an optical adjustment layer provided on the surface to be in contact with the first region and at least a part of the second region. A thin film portion having a film thickness smaller than a maximum film thickness of a portion of the optical adjustment layer in contact with the second region is provided in at least a part of the portion of the optical adjustment layer in contact with the second region.

Abstract: A lens advancing device of the present invention includes an advancing ring holding the lens unit; a holder supporting the advancing ring; an operation unit; and a came surface formed on one of the advancing ring and the holder, and an abutting part formed on the other of the advancing ring and the holder and is engageable with the cam surface. The lens unit is disposed along an optical axis by rotating the advancing ring and thereby changing the engaging position between the cam surface and the abutting part. The lens advancing device further includes a pressing part retaining the elastic body be abutment to make the elastic body exert the elastic force upon the advancing ring and press the abutting part against the came surface. This reduces changes of resistance in rotational operation of the advancing ring between photographing modes, which makes the user feel less uncomfortable.

Abstract: A lens advancing device of the present invention includes an advancing ring holding the lens unit; a holder supporting the advancing ring; an operation unit; and a came surface formed on one of the advancing ring and the holder, and an abutting part formed on the other of the advancing ring and the holder and is engageble with the cam surface. The lens unit is disposed along an optical axis by rotating the advancing ring and thereby changing the engaging position between the cam surface and the abutting part. The lens advancing device further includes a pressing part retaining the elastic body be abutment to make the elastic body exert the elastic force upon the advancing ring and press the abutting part against the came surface. This reduces changes of resistance in rotational operation of the advancing ring between photographing modes, which makes the user feel less uncomfortable.

Abstract: A rear lens located nearest to an image-forming plane in a compound image pickup lens has a barrel insert portion formed around a peripheral edge inserted in a lens holding portion, and an out-of-barrel lens portion in continuity to the barrel insert portion, of an outer diameter larger than an inner diameter of the lens holding portion and having a confronting surface at a position spaced from an end surface of the lens holding portion, wherein at least the end surface of the lens holding portion and the confronting surface of the out-of-barrel lens portion are fixed with a first adhesive through a spaced portion. The structure can prevent the first adhesive from sticking to the surfaces of image pickup lens.

Abstract: A rear lens located nearest to an image-forming plane in a compound image pickup lens has a barrel insert portion formed around a peripheral edge inserted in a lens holding portion, and an out-of-barrel lens portion in continuity to the barrel insert portion, of an outer diameter larger than an inner diameter of the lens holding portion and having a confronting surface at a position spaced from an end surface of the lens holding portion, wherein at least the end surface of the lens holding portion and the confronting surface of the out-of-barrel lens portion are fixed with a first adhesive through a spaced portion. The structure can prevent the first adhesive from sticking to the surfaces of image pickup lens.