Patent ID: 8767204
Filing Date: 2014-07-01
Classification: G01J

Abstract:
1. A spectrophotometer comprising: a light source unit for forming a measuring light beam for spectrometry; a specimen chamber into which said measuring light beam is introduced; a built-in detector that is built into a main unit of a spectrophotometer; and an external detector disposed on an external accessory that can be mounted to or removed from said main unit; wherein a mountable/removable optical path switcher is installed in said specimen chamber, for switching an optical path of said measuring light beam is switched from an ordinary optical path leading to said built-in detector to an external optical path leading to said external detector, and measurement based on detection signals from said built-in detector is replaced by measurement based on detection signals from said external detector; and further comprising: a measurement data threshold storage-value unit for storing a threshold value T for measurement data from said built-in detector or said external detector; and a light-receiving detector recognition unit for recognizing whether either said built-in detector or said external detector can receive said measuring light beam based on the result of a comparison of threshold value T to measurement data from said built-in detector or said external detector while said measuring light beam is introduced into the specimen chamber.