招标范围：Name of procurement item:Biomicroscopy Procurement demandsc:Uses: Used in the diagnosis and teaching of pathological histology. 1.Optical system: Infinite correction optical system. 2.It has the functions of bright field, dark field and phase difference. 3.Object lens converter be more five bits. 4.Total magnification:twelve point five to thousandX. 5.Observing lens barrel:30 degree three-eye barrel,Vertical exit:0 to 100 percent,50 to 50 percent,100 to 0 percent 100 percent spectral energy;FOV more than 22mm. 6.Transmitted light illumination: 12V100W halogen lamp, to meet the lighting brightness of multi-person cables. 7.Sunlight filter function 8.Sample clip can be operated by one hand to facilitate simultaneous recording. 9.The height of the focusing knob of the 15 degree inclined viewing barrel can be adjusted and the operation is comfortable. 10.Full symmetry of focusing and X-Y regulation. 11.Focus: Focus knob height is adjustable. 12.With focusing function, step 1 um, with focusing damping and adjustable torque. 13.Shockproof stand. 14.10XWide field eyepiece more than 23mm. 15.Advanced flat-field achromatic objective 4X numerical aperture more than 0.1,10X numerical aperture more than 0.25,20X numerical aperture more than 0.4,40X numerical aperture more than 0.60,100X numerical aperture more than 1.20(Oil mirror). 16.With LED pointer, it is convenient for many people to share cable teaching. 17.It can achieve the teaching use of five people.