美国Photo Research
美国Photoresearch 公司成立于1941年，是一家专门致力于光度、色度、辐射度测量仪器研究生产的世界著名公司。多年来，公司通过多位著名教授的研发，取得多项专利技术，在科研、航空、显示领域具有绝对的优势，始终在光度、色度、辐射度的测量仪器领域中保持遥遥领先的地位。公司拥有十三个自己独立的光学校准实验室，具有NIST（美国最高计量单位）的溯源标准，出厂的每一台仪器都经过精确的校准，保证了仪器最高的精度和稳定性。
Photo Research is the world leader and innovator in high precision, state of the art electro-optical instrumentation and systems. Photo Research has delivered world-class light and color measurement solutions, serving the cathode ray tube ("CRT")/flat panel display ("FPD"), automotive, aerospace, lighting, motion picture, research and development and related industries for over 60 years.

Photo Research has three main product lines. The Spectra product line offers systems to a wide variety of industries for research, quality control and on-line testing. This line includes the only truly portable battery operated Spectroradiometer; the PR-650 fast scanning SpectraColorimeter. The PR-705/715 SpectraScan complements this line with an industry first automated aperture wheel with up to six apertures. The Pritchard® line originated with the industry workhorse the PR-1980 series.

The Pritchard is the most widely used photometer in the world. The newer addition to this series is the PR-880. This is the only fully automated filter photometer available today. The PR-880 is ideal for today's automated factory and ATE/OEM environments.

Photo Research developed the first commercially available video photometer over 15 years ago. In 2001, the newest and most advanced video photometer the PR-920 digital video photometer was introduced. Video instrumentation provides high resolution inspection of CRT and flat panel displays and instrument panels. The

Photo Research Optical Metrology Laboratory (PROML) is a supplier of and service provider to optical radiation standards, calibration and measurement for major manufacturers of instruments, displays, devices and materials. All Photo Research instruments are calibrated to NIST-traceable standards.

Photo Research developed many industry standards, such as Spectra Pritchard Optics, utilized in astronomical and star-simulation measurements. Photo Research is also instrumental in supporting standards for organizations including VESA, ISO and SAE.