发明名称 |
Fluorometric analyzer including shutter means for simultaneously shielding sample and photodetector during sample change |
摘要 |
A fluorometric analyzer includes a head assembly wherein the photomultiplier tube and excitation lamp of the analyzer are received in respective cavities and a transparent test cell is provided to receive a liquid sample. A first optical passage is provided between the lamp cavity and the test cell, and a second optical passage at right angles to the first optical passage is provided between the test cell and the photomultiplier tube cavity. A manually rotatable shutter assembly concentrically disposed about the test cell includes apertures for allowing light to pass through the optical passages when the shutter is rotated to a first position, and for simultaneously blocking the passage of light through the passageways when the shutter is rotated to a second position. Rotation of the shutter is limited by a first guide pin, and a second guide pin provides a desired degree of friction between the shutter assembly and the head assembly housing.
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申请公布号 |
US4291230(A) |
申请公布日期 |
1981.09.22 |
申请号 |
US19790018152 |
申请日期 |
1979.03.07 |
申请人 |
BAXTER TRAVENOL LABORATORIES, INC. |
发明人 |
HEISS, LOUIS R. |
分类号 |
G01N21/64;(IPC1-7):G01N21/38;G01J1/58;G01N21/01 |
主分类号 |
G01N21/64 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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