n bk7 glass bi concave lens

{"cid":"91201126","title":"Lighting Uncoated 1mm To 300mm BK7 Bi Concave Lens","imgUrl":"https:\/\/img.chinax.com\/nimg\/c5\/d4\/aa7ac010145171d831a00ecbfcfd-200x200-1.jpg","attrs":{"Price":"$0.2~$100","Brand Name":"Advance","Model Number":"as requirements","Minimum Order Quantity":"1","Delivery Time":"3~30days after order","Place of Origin":"China","Packaging Details":"EVA+Vacuum","Supply Ability":"1000k\/per month","Vision Effect":"lenticular","Lenses Color":"Clear","Focal length":"custom","Diameter":"25 mm","Diameter tolerance":"+\/-0.005mm","Surface accuracy":"N=1~0.5","Centerthickness tolerance":"+\/-0.001mm","Focal length tolerance":"+\/-1%","Surface quality":"10\/5~60\/40","Application area":"Imaging,Lighting,Laser etc","Certification":"ROHS\\Reach","Payment Terms":"T\/T&L\/C","Interface Type":"Canon EF-S","Centerthickness":"5 mm","Width Tolerance":"+\/-0.01mm","Style":"Antique","Application Area":"Lighting,Laser etc","Shape":"Spherical","Material":"Optical Glass","Operatingtemperature":"-20 to 70 \u00b0C","Filter Ring Color":"Black,Sliver,Gold","Customized Support":"OEM, ODM","Coating Choice":"Green","Refractiveindex":"1.52","Focal Length":"150mm"}}

{"cid":"91225647","title":"UV Fused Silica Quartz Glass OEM ODM Bi Concave Lens With AR Coating","imgUrl":"https:\/\/img.chinax.com\/nimg\/72\/ef\/34401ee8c275e363aa7c54869208-200x200-1.jpg","attrs":{"Price":"$1","Brand Name":"Non","Model Number":"LP","Minimum Order Quantity":"1000","Material":"K 9, optical glass, UV quartz, fluorine","Center thickness":"\u00b10.03~0.1mm","Clear aperture":">90%","Centering":"30\"~3'","Name":"Fused Silica Quartz Glass","Place of Origin":"Guangdong, China","Focal length":"\u00b12%@587.6nm","Dimensional tolerances":"-0.05~0.1mm"}}

{"cid":"91213983","title":"Spread Light Thin Spherical Lens Ge Material Double Concave Lens","imgUrl":"https:\/\/img.chinax.com\/nimg\/64\/f2\/afaa8179624ea7aba2061a488f4e-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"STAR OPTIC","Model Number":"DCV","Minimum Order Quantity":"5pcs","Delivery Time":"Negotiable","Certification":"RoHS, ISO9001","Place of Origin":"Wuhan, China","Payment Terms":"T\/T, Western Union, Paypal","Supply Ability":"50000pcs\/Month","Packaging Details":"Safe and dust-free packing","Product Name":"N-BK7 Double Concave (Bi-Concave) Spherical Lens","Substrate":"N-BK7","Usage":"mage reduction and to spread light","Wavelength Range":"UV, VIS and IR","Form":"two concave surfaces","Feature":"Negative focal length"}}