초록 ▼

A relative position detector has a photodetector arrangement for providing light and responding to the intensity of the light when reflected thereto. A member such as a cylindrical pin having a surface reflective of the light, convex to the photodetector arrangement, and movable relative thereto ref

A relative position detector has a photodetector arrangement for providing light and responding to the intensity of the light when reflected thereto. A member such as a cylindrical pin having a surface reflective of the light, convex to the photodetector arrangement, and movable relative thereto reflectively sweeps the light across the photodetector arrangement for responding thereto to produce a continuously-curving response indicating with its peak the position detected. The continuously-curving response can be differentiated in a peak detector for even more precise position detection. A mount which may be used for the photodetector arrangement has a support member and a member having a lower coefficient of thermal expansion slidably supported thereon, except for one fixed point.

대표청구항 ▼

In a centrifugal analyzer having a support, a rotatable rotor on the support, and an optical unit radially spaced from the axis of rotor rotation and having an optical path for optically analyzing a liquid in a cuvette when on the rotor and rotated thereby to the optical path of the optical unit, a

In a centrifugal analyzer having a support, a rotatable rotor on the support, and an optical unit radially spaced from the axis of rotor rotation and having an optical path for optically analyzing a liquid in a cuvette when on the rotor and rotated thereby to the optical path of the optical unit, a position detector for detecting the rotational position of the rotor relative to the optical unit in which the cuvette will be in the optical path of the optical unit for the optical analysis, comprising: a photodetector fixed to the support and having light emitting means for emitting light and light receiving means for responding to the intensity of the light when reflected thereto; and a member having a surface reflective of the light, convex to the photodetector, and movable with the rotor relative to the photodetector so as to sweep the light reflectively across the photodetector means for responding thereto for providing a continuously-curving response of the light receiving means.