39results about How to "Reduce stray light interference" patented technology

The invention discloses an ultraviolet spectrophotometer, detecting head, and relates to an ultraviolet spectrophotometer. The invention provides a small portable ultraviolet spectrophotometer detecting head which not only has the advantages of small volume, high sensitivity and corrosion resistance, but also can be separated from an instrument host computer and used as soon as being connected, and meet the requirement on real-time detection of fields and sites. The ultraviolet spectrophotometer detecting head is provided with an incident optical fiber, an incident optical fiber connector, a return optical fiber connector, an incident optical fiber collimator, a return optical fiber collimator, a return optical fiber, an upper shell, a lower shell, conical surface reflection prisms and a sample pool, wherein an output end of the incident optical fiber is connected with an input end of the incident optical fiber connector; an output end of the incident optical fiber connector is connected with the incident optical fiber collimator; output light of the incident optical fiber collimator enters the return optical fiber collimator after being reflected by more than one odd number of theconical surface reflection prisms arranged in the sample pool; an output end of the return optical fiber collimator is connected with an input end of the return optical fiber connector; an input endof the return optical fiber connector is connected with the input end of the return optical fiber; and the sample pool is arranged in a cavity between the upper shell and the lower shell.

The invention relates to a laser vibration measurement system which comprises a laser unit (1), a focus imaging unit (2), a focusing unit (3) and a control unit (4), wherein the focus imaging unit (2)is connected with the laser unit (1); the focusing unit (3) is connected with the focus imaging unit (2), wherein the control unit (4) is connected with the focus imaging unit (2) and the focusing unit (3). The laser vibration measurement system provided by the invention can automatically complete the identification and the vibration measurement of an object, so that the manual operation processis reduced. Meanwhile, as laser is adopted for the vibration measurement, manual focusing, identification and other processes are not required in the whole process, so that the injury to an operator is avoided, and the safety of the whole measurement system is improved. The measurement system provided by the invention realizes the coaxial synchronization of laser focusing and image acquisition during the laser vibration measurement, so that the measurement accuracy and the measurement efficiency of the whole measurement system are improved.