JPH0485133U - - Google Patents

Description

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the first invention, in which Figure 1 is a longitudinal side view of the radiation thermometer, Figure 2 is a front view of the main part, and Figure 3 is an enlarged longitudinal side view of the main part. It is a diagram. FIG. 4 is a longitudinal sectional side view of a radiation thermometer showing an embodiment of the second invention, and FIG. 5 is an enlarged longitudinal sectional side view of the main parts. FIG. 6 is an enlarged longitudinal sectional side view of the main parts showing another embodiment of the second invention. FIG. 7 is a longitudinal sectional side view of a radiation thermometer showing a conventional example, and FIG. 8 is a schematic longitudinal sectional side view of a radiation thermometer showing another conventional example. 2...Primary mirror, 4...Infrared detector, 7...Secondary mirror, 9...Window, 10...Sighting light source, 11...Half mirror, 12...Masking, 16...Filter.

Claims (1)

[Claims for Utility Model Registration] (1) A primary mirror consisting of a concave mirror into which infrared rays emitted from a measurement point are incident, an infrared detector placed at the center of the primary mirror, and an infrared detector placed opposite the primary mirror. A radiation thermometer is provided with a secondary mirror consisting of a convex mirror having a smaller diameter than the primary mirror, which images the infrared rays reflected by the primary mirror on the light receiving surface of the infrared detector, and a window is provided in the center of the secondary mirror. , a visible light aiming light source is arranged on the back side of the secondary mirror to face the detector, and infrared rays are transmitted to an optically intermediate position between the aiming light source and the light receiving surface of the detector, and visible light is reflected. A radiation thermometer characterized in that a half mirror is provided at right angles to the optical axis, and the center of the half mirror, which serves as a dead space for the optical system, is masked to block infrared rays. (2) A primary mirror consisting of a concave mirror into which the infrared rays emitted from the measurement point are incident, an infrared detector placed at the center of the primary mirror, and an infrared detector placed opposite the primary mirror to receive the infrared rays reflected by the primary mirror. A radiation thermometer is equipped with a secondary mirror that is a convex mirror with a smaller diameter than the primary mirror that forms an image on the light-receiving surface of the infrared detector. A visible light aiming light source is arranged to face the detector, and a half mirror that transmits infrared rays and reflects visible light is placed at an optical intermediate position between the aiming light source and the light receiving surface of the detector, relative to the optical axis. 1. A radiation thermometer, characterized in that the window is provided at a right angle and is provided with a filter that transmits visible light but blocks infrared rays.