The LTI 20.20 Ultralyte 1000 is a Home Office Type Approved laser speedmeter. It is a hand-held device that is approved for use as an attended actively operated device. When a target vehicle is identified by the operator the device is directed towards the target vehicle by the use of a sighting scope. The operator pulls the trigger activating an infra-red light beam that is directed to and reflects from the target vehicle. The change in time-of-flight of the light passing to and from the target is used to determine the speed of the vehicle.
The signal processing within the device will prevent measurements being displayed when more than one target is reflecting the signal back to the device or the time-of-flight data does not represent that of a credible target. On completion of the speed measurement, approximately 1/3rd of a second, the speed and the distance to the acquired target will be displayed to the operator on the rear display of the device. The speed is then noted by the operator for use in a prosecution for exceeding the speed limit.
The approval of the device is certified by The Light Beam Speed Measuring Device (Amendment) Approval 2009, dated 10 August 2009.
The CONCEPT and RANGER devices are Home Office Type Approved laser speedmeters. Both Approved devices are formed by coupling a laser speedmeter to a camera, a data recorder and a video recording mechanism to form 2 versions of similar speed cameras known as CONCEPT and RANGER. The laser speedmeter used by both systems is the LTI20.20 Ultralyte 1000.
The CONCEPT and RANGER data and video recorders are 2 similar devices that differ in layout and some components however their operation and Approval can be described in the same way. The CONCEPT and RANGER speedmeters are both Approved for use in the attended actively operated mode.
When a target vehicle is identified by the operator the device. Comprising the laser speedmeter and camera, is directed towards the target vehicle by the use of a sighting scope. The operator pulls the trigger activating an infra-red light beam that is directed to and reflects from the target vehicle. The change in time-of-flight of the light passing to and from the target is used to determine the speed of the vehicle.
The signal processing within the device will prevent measurements being displayed when more than one target is reflecting the signal back to the device or the time-of-flight data does not represent that of a credible target. Messages that show that the data is not suitable are passed to the data and video recorder for display. The speed of a target cannot be acquired from data that does not meet strict criteria.
On completion of the speed measurement, approximately 1/3rd of a second, the speed and the distance to the acquired target will be displayed to the operator on the rear display of the device. At the same time the speed and distance information produced by the LTI20.20 UL 1000 is sent by a data link to the data recorder and then to the video recording mechanism. A video screen on the device shows the scene that is in the view of the camera to the operator so that the scene is correctly focused and formed and is capable of identifying the vehicle that is the subject of the speed measurement.
Data in the video recording will show the time, date, operator and site identification, video field number, speed and range of the target.
The record from the device is the speed of the target shown on the data area of the image produced by the video recorder before a “timeout” indication appears in the image. The video is saved to a compact flash memory card that can be copied to any other data storage medium. The stored video data is then processed to extract the images that shows the scene, the identification of the vehicle and the relevant data showing the date, time, site and speed.
The approval of the CONCEPT II and RANGER device is certified by The Light Beam Speed Measuring Device Approval 2020 dated 15 April 2010