optical experiment prism with 0 3 arcsecond accuracy

{"cid":"91223678","title":"Turntable Calibration By 24 Sided Prism For Optical Experiments With 0.3 Arcsecond Accuracy","imgUrl":"https:\/\/img.chinax.com\/nimg\/0a\/78\/46fa8b809958fa8b91edb41810de-200x200-1.jpg","attrs":{"Price":"3000~5000 USD","Brand Name":"SPR-ing","Model Number":"24 side","Minimum Order Quantity":"1 piece","Delivery Time":"1~3 weeks","Place of Origin":"Shenzhen","Payment Terms":"L\/C,T\/T","Supply Ability":"500\/month","Packaging Details":"Carton","Product Category":"Polyhedral Prism","Perpendicularity of Working Surface to Datum Plane":"Grade 0 (Grade II): \u2264 \u00b110 arcseconds","Working Surface Roughness":"Ra \u2264 0.025 \u03bcm","Application":"Optical Experiments","Surface Finish":"Polished","Hardness":"HRC 62-65","Working Angle Measurement Uncertainty":"Grade 0 (Grade II): \u2264 0.3 arcseconds","Working Surface Flatness":"Grade 0 (Grade II): \u2264 0.03 \u03bcm"}}