| 摘要 |
PROBLEM TO BE SOLVED: To provide an electronic distance meter which is small, light, and inexpensive. SOLUTION: The emitted light from a light-emitting element (2) is guided to a shield tube (5) disposed at the center of a transmission/reception light objective lens (4) through a parallel prism (6), to prevent the emitted light (11) from scattering. Thus, with no light emitted from the light-emitting element being attenuated, measurement of a wanted distance is possible with no use of a high-output light-emitting element. Since the parallel prism (6) is disposed inside the transmission/reception light objective lens, a smaller electronic distance meter is manufactured, compared with the case in which the parallel prism (6) is disposed outside the transmission/reception light objective lens, resulting in lighter weight as well.
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