Abstract: A projection video display apparatus includes: a video projection screen, having a front and a rear surface, arranged in an indoor space. The video projection screen transmits video light from behind the rear surface or in front of the front surface to display video on the front surface. The front surface functions as a video display surface. A video projecting apparatus, arranged in a side of the rear surface or the front surface, enlarges and projects the video light from the rear or front surface. The video projecting apparatus is configured by an optical scanning video projecting apparatus that forms the video by scanning video light composed of coherent light on the video projection screen. The video projection screen guides the video light from the video projecting apparatus toward a direction to the front surface, and causes part of the light in the indoor space to be transmitted therethrough.

Abstract: An investigation assist device includes a processor and a storage that records information on a road map including a plurality of intersections and captured videos of a plurality of cameras respectively in correlation with a capturing time, camera information, and intersection information. The processor retrieves a vehicle satisfying a retrieval condition based on a captured video of the camera specified by camera information corresponding to designated intersection information specifying at least one intersection of the plurality of intersections. The processor superimposes a traveling direction of a selected vehicle at the time of passing through an intersection corresponding to the designated intersection information on a position of the intersection on the road map in response to selection of the information on the vehicle.

Abstract: An investigation assist device includes a processor and a storage that records information on a road map including a plurality of intersections and captured videos of a plurality of cameras in correlation with a capturing time, camera information, and intersection information. The processor retrieves at least one vehicle satisfying a retrieval condition and extracts a traveling direction of the vehicle when passing through each of the plurality of intersections based on the captured videos of the plurality of cameras in response to a designation of the retrieval condition including information on time when an incident occurs and feature information on a vehicle causing the incident. The processor superimposes a traveling route of the vehicle on the road map based on the traveling direction extracted for each of the intersections and outputs the traveling route to an output unit.

Abstract: A projection video display apparatus and method for solving a problem of deterioration of visibility of video that is projected on a transparent or semi-transparent screen. In a projection video display method for projecting and displaying video light on a rear surface or front surface of a transparent or semi-transparent video projection screen disposed in a space by a projection video display apparatus, video light to be projected and displayed is generated, the generated video light is projected on the rear surface or front surface of the transparent or semi-transparent video projection screen, and at that time, a video display position recognition screen for making an observer of the video recognize a position where the video is projected is projected on the transparent or semi-transparent video projection screen before start of the projection of the video light or simultaneously with the start of the projection of the video light.

Abstract: A projection video display apparatus includes: a video projection screen, having a front and a rear surface, arranged in an indoor space. The video projection screen transmits video light from behind the rear surface or in front of the front surface to display video on the front surface. The front surface functions as a video display surface. A video projecting apparatus, arranged in a side of the rear surface or the front surface, enlarges and projects the video light from the rear or front surface. The video projecting apparatus is configured by an optical scanning video projecting apparatus that forms the video by scanning video light composed of coherent light on the video projection screen. The video projection screen guides the video light from the video projecting apparatus toward a direction to the front surface, and causes part of the light in the indoor space to be transmitted therethrough.

Abstract: A projection video display apparatus includes: a video projection screen, having a front and a rear surface, arranged in an indoor space. The video projection screen transmits video light from behind the rear surface or in front of the front surface to display video on the front surface. The front surface functions as a video display surface. A video projecting apparatus, arranged in a side of the rear surface or the front surface, enlarges and projects the video light from the rear or front surface. The video projecting apparatus is configured by an optical scanning video projecting apparatus that forms the video by scanning video light composed of coherent light on the video projection screen. The video projection screen guides the video light from the video projecting apparatus toward a direction to the front surface, and causes part of the light in the indoor space to be transmitted therethrough.

Abstract: A projection video display apparatus and method for solving a problem of deterioration of visibility of video that is projected on a transparent or semi-transparent screen. In a projection video display method for projecting and displaying video light on a rear surface or front surface of a transparent or semi-transparent video projection screen disposed in a space by a projection video display apparatus, video light to be projected and displayed is generated, the generated video light is projected on the rear surface or front surface of the transparent or semi-transparent video projection screen, and at that time, a video display position recognition screen for making an observer of the video recognize a position where the video is projected is projected on the transparent or semi-transparent video projection screen before start of the projection of the video light or simultaneously with the start of the projection of the video light.

Abstract: A projection video display apparatus includes: a video projection screen, having a front and a rear surface, arranged in an indoor space. The video projection screen transmits video light from behind the rear surface or in front of the front surface to display video on the front surface. The front surface functions as a video display surface. A video projecting apparatus, arranged in a side of the rear surface or the front surface, enlarges and projects the video light from the rear or front surface. The video projecting apparatus is configured by an optical scanning video projecting apparatus that forms the video by scanning video light composed of coherent light on the video projection screen. The video projection screen guides the video light from the video projecting apparatus toward a direction to the front surface, and causes part of the light in the indoor space to be transmitted therethrough.

Abstract: An investigation assist device includes a processor and a storage that records information on a road map including a plurality of intersections and captured videos of a plurality of cameras in correlation with a capturing time, camera information, and intersection information. The processor retrieves at least one vehicle satisfying a retrieval condition and extracts a traveling direction of the vehicle when passing through each of the plurality of intersections based on the captured videos of the plurality of cameras in response to a designation of the retrieval condition including information on time when an incident occurs and feature information on a vehicle causing the incident. The processor superimposes a traveling route of the vehicle on the road map based on the traveling direction extracted for each of the intersections and outputs the traveling route to an output unit.

Abstract: An investigation assist device includes a processor and a storage that records information on a road map including a plurality of intersections and captured videos of a plurality of cameras respectively in correlation with a capturing time, camera information, and intersection information. The processor retrieves a vehicle satisfying a retrieval condition based on a captured video of the camera specified by camera information corresponding to designated intersection information specifying at least one intersection of the plurality of intersections. The processor superimposes a traveling direction of a selected vehicle at the time of passing through an intersection corresponding to the designated intersection information on a position of the intersection on the road map in response to selection of the information on the vehicle.

Abstract: A wideband distributed or feedback amplifier monolithic microwave integrated circuit (MMIC) is disclosed that contains an integrated group delay equalizer circuit to compensate for the group delay variation of the amplifier circuitry. The MMIC amplifier is capable of achieving a predicted constant group delay with little variation over a wide frequency range. In addition, the group delay equalizer circuit enables the amplifier to achieve flat (constant) gain over a wide bandwidth, while maintaining constant group delay. Furthermore, the group delay equalizer circuitry requires only a small portion of the total MMIC area.

Abstract: A wideband distributed or feedback amplifier monolithic microwave integrated circuit (MMIC) is disclosed that contains an integrated group delay equalizer circuit to compensate for the group delay variation of the amplifier circuitry. The MMIC amplifier is capable of achieving a predicted constant group delay with little variation over a wide frequency range. In addition, the group delay equalizer circuit enables the amplifier to achieve flat (constant) gain over a wide bandwidth, while maintaining constant group delay. Furthermore, the group delay equalizer circuitry requires only a small portion of the total MMIC area.

Abstract: A zoom lens operating mechanism comprises a stationary cylinder, an operating ring rotatably mounted on the stationary cylinder, a cam cylinder rotatably mounted within the stationary cylinder and coupled to the operating ring for rotation therewith, at least one lens group coupled to the cam cylinder so as to be movable within a zoom range as the operating ring is rotated within a first angular range and within a close-up range as the operating ring is rotated within a second angular range, a guide arrangement formed in the stationary cylinder, and an operating member mounted on the operating ring and cooperating with the guide arrangement to define the first and second angular ranges.