Two different radius are in  everyone  surface.  Two surface are both so that.         Single lens with both surfaces  are   complex surface.Or  two surfaces of 

Material:BK7 grade A optical glassSize:Dia 3.0~200.0mm  x  thickness  0.3~60.0mm Dimension tolerance:0/-0.1mmThickness Tolerance:±0.2mm　Angle tolerance:5 arc sec—3 arc minOptic

Material:CaF2   single crystalSize:4mm-220mmDimension tolerance:0/-0.15mmThinkness Tolerance:±0.2mmCentration:3 arc min　Surface figure:1/4λSurface quality:60—40scratch and digClear 

Material:Calcium Fluoride Single CrystalSize:Dia 3.0~200.0mm  x  thickness  0.3~60.0mm Dimension tolerance:0/-0.1mmThickness Tolerance:±0.2mm　Angle tolerance:5 arc sec—3 arc min

Material:optical glass,fused silica, Size:4mm-100mmDimension tolerance:±0.2mm　Angle tolerance:±30arc secOptical parallelism:10arc secFlatness:λ／2—λ/8Surface Clear aperture:90％ �

Material:BK7,UV-grade fused silicaParaxial focal length:±5mm—±3000mm±1%Length:2mm—300mm±1%Width:2mm—200mm±1%Surface quality:60-40scratch and digSurface Figure:λ／4,λ/2Centration:

Material:BK7,UV-grade fused silicaSize:3mm-220mmThickness Tolerance:±0.2mmCentration:3 arc min　Surface figure:1/4λSurface quality:60—40scratch&

Material:BK7,UV-grade fused  silicaParaxial focal length:±5mm—±3000mm±1%Length:2mm—300mm±1%Width:2mm—200mm±1%Surface 

Material:BK7,UV-grade fused silicaSize:3mm-220mmThickness Tolerance:±0.2mmCentration:3 arc min　Surface figure:1/4λSurface quality:60—40scratch&