JPH0224313U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a perspective view schematically showing the configuration of the main parts of an embodiment of the present invention, Fig. 2 is a top and side view showing the structure of the embodiment in detail, and Fig. 3 is the operation of the embodiment. FIG. 4 is a diagram showing the relationship between the center of gravity position and the light amount ratio R to explain the operation of the same embodiment. FIG. A diagram showing the main configuration of an embodiment of
Figure 6 is a schematic diagram showing the principle of an example of a conventional distance measuring device, Figure 7 is a diagram explaining the principle of a semiconductor position detection element PSD, and Figure 8 is a conventional distance measuring device with a wide field of view. A schematic perspective view showing the configuration of an example of the device,
Figure 9 is a block diagram showing a conventional distance measuring circuit.
0 and 11 are diagrams for explaining problems with conventional distance measuring devices. 1...Light source (infrared light emitting diode), 2...Light projection lens, 21...Cylindrical lens.

Claims (1)

[Scope of Claim for Utility Model Registration] In a camera distance measuring device that emits pulsed light toward the subject and detects the subject distance based on the light reception signal of the light receiving section consisting of a semiconductor position detection element, the light emission pattern is based on the baseline. A distance measuring device comprising a light emitting part that is elongated in a direction perpendicular to the light emitting part and whose center part has a larger amount of light per unit length than its periphery.