CPJ series Optical Comparator is a highly effective precision measuring instrument integrating optical, mechanical and electric elements. The Optical Comparators are of compact structure, simple and good appearance, economical and reliable excellence, and capable of conducting coordinate measurement and outline compare measurement on work pieces. The image of a work piece can be a positive image or a negative image. The former means the image on the projection screen is completely identical with the work piece on the worktable in horizontal and vertical direction, while the latter means the image on the projection screen is completely opposite to the work piece on the worktable in horizontal and vertical direction. The projector series is characterized by simple and direct measurement, high efficiency, high optical quality, clear imaging object lens and accurate magnifying ratio. Under transmission light, the error of outline measurement is below 0.08%. The resolution for the linear encoder is 0.5um, the machine accuracy can be (3+L/75)um, We have Rational Profile Projector share about 60% market in China, our main products passed CE. and had exported to many coutries and areas since 2000. We are the first company in china who supply real image comparator, motor comporator and turrect measuring projector.