公开(公告)号：EP0018390B1

公开(公告)日：1984-08-01

申请号：EP79900645.7

申请日：1979-05-18

Applicant: BECKMAN INSTRUMENTS, INC.

Inventor： HAUNOLD, Otto ,  GREENE, Malbone Watson

IPC: G01J3/02 ,  G01N21/25 ,  G01N21/64 ,  G03B9/00

CPC classification number: G01N21/0332 ,  G01N21/763 ,  G01N2201/0648

Abstract: A sample holder and shutter assembly (20) for photometers in which a stationary sample chamber body (40) is mounted in close proximity to a photosensitive device (18). A light path is provided from the sample chamber (53) to the photosensitive device (18) and shutter means is provided for selectively interrupting and opening the light path between the photosensitive device (18) and the sample chamber (53) without moving the sample chamber. Heat exchange means including a heat pump (63) and a heat reservoir (68) are provided for maintaining a desired temperature in the sample chamber (53). The sample chamber body (40) is thermally connected to said heat pump (63) and is preferably thermally isolated from the means mounting it. In one embodiment, the heat pump (63) and heat reservoir (68) are flexibly connected.