Abstract: A housing of a light emission/reception device includes a housing body and a window member. The housing body has an opening and accommodates a light emitting unit having one or more light emitting elements, and a light receiving unit having one or more light receiving elements. The window member covers the opening of the housing body, enables emitted light that is emitted from the light emitting unit to be transmitted therethrough toward the exterior of the housing, and enables incident light from the exterior of the housing to be transmitted therethrough, so that the incident light enters the light receiving unit. Also, the window member is provided with a propagation suppressing member configured to suppress propagation of light within the window member.

Abstract: A scanner has a rotational shaft and at least one reflection surface. The scanner rotates the at least one reflection surface together with the rotational shaft to thereby (i) change a direction of the light beam transmitted from the phototransmitter and incident on the scanner to output a changed light beam in a main scanning direction that is orthogonal to an axial direction of the rotational shaft, and (ii) reflect an arrival light beam arriving from a scanning region to thereby output the light beam to a direction in which the light beam is incident on the scanner. A photoreceiver receives the arrival light beam reflected by the scanner. The photoreceiver includes a received-light deflection mirror that deflects the arrival light beam outputted from the scanner in a second direction different from the first direction, and a light receiving device that receives the arrival light beam deflected by the received-light deflection mirror.

Abstract: A housing of a light emission/reception device includes a housing body and a window member. The housing body has an opening and accommodates a light emitting unit having one or more light emitting elements, and a light receiving unit having one or more light receiving elements. The window member covers the opening of the housing body, enables emitted light that is emitted from the light emitting unit to be transmitted therethrough toward the exterior of the housing, and enables incident light from the exterior of the housing to be transmitted therethrough, so that the incident light enters the light receiving unit. Also, the window member is provided with a propagation suppressing member configured to suppress propagation of light within the window member.

Abstract: In a distance measuring apparatus, a housing is made of a first material that is non-transmissive of an electromagnetic wave, and includes an inner chamber, and a window portion made of a second material that is transmissive of the electromagnetic wave and reflection wave. The housing includes a partitioning wall made of a third material that is non-transmissive of the electromagnetic wave. The partitioning wall is configured to partition the inner chamber of the housing into a first container chamber and a second container chamber. In the first container chamber, a transceiver is installed. The first container chamber communicates with the window portion. In the second container chamber, the processing unit is installed.

Abstract: In a distance measuring apparatus, a housing is made of a first material that is non-transmissive of an electromagnetic wave, and includes an inner chamber, and a window portion made of a second material that is transmissive of the electromagnetic wave and reflection wave. The housing includes a partitioning wall made of a third material that is non-transmissive of the electromagnetic wave. The partitioning wall is configured to partition the inner chamber of the housing into a first container chamber and a second container chamber. In the first container chamber, a transceiver is installed. The first container chamber communicates with the window portion. In the second container chamber, the processing unit is installed.