Title

可见光和近红外的高透射率
对成本敏感应用的理想选择

B270 半球透镜具有模压球面和抛光的平面，与球透镜相比更便于安装。B270 基片具有从可见光到近红外（NIR）的高透光率，折射率与N-BK7相似，使这些透镜成为对成本敏感应用的理想替代品。每种直径的透镜都有三种形式，标准半球形、截断型（低半球）和扩展型（超半球），提供多种选择以最好地满足系统机械要求。B270 半球透镜可用于高功率LED、光纤耦合、内窥镜、显微镜和激光测量应用。

通用规格

基底:

涂层:

Uncoated

折射率 nd:

1.523

波长范围 (nm):

360 - 2700

标题	产品编码	Dia. (mm)	基底	类型	CT (mm)	涂层	折射率 nd	半径 R (mm)	波长范围 (nm)
3mm Diameter, B270 Half-Ball Lens	21-896	3.00 ±0.1	B270	Half-Ball Lens	1.50 ±0.15	Uncoated	1.523	1.50	360 - 2700
3mm Diameter, Truncated B270 Half-Ball Lens	21-897	3.00 ±0.1	B270	Half-Ball Lens	1.20 ±0.15	Uncoated	1.523	1.50	360 - 2700
3mm Diameter, Extended B270 Half-Ball Lens	21-898	3.00 ±0.1	B270	Half-Ball Lens	1.80 ±0.15	Uncoated	1.523	1.50	360 - 2700
4mm Diameter B270 Half-Ball Lens	21-899	4.00 ±0.1	B270	Half-Ball Lens	2.00 ±0.15	Uncoated	1.523	2.00	360 - 2700
4mm Diameter, Truncated B270 Half-Ball Lens	21-900	4.00 ±0.1	B270	Half-Ball Lens	1.70 ±0.15	Uncoated	1.523	2.00	360 - 2700
4mm Diameter, Extended B270 Half-Ball Lens	21-901	4.00 ±0.1	B270	Half-Ball Lens	2.30 ±0.15	Uncoated	1.523	2.00	360 - 2700
5mm Diameter B270 Half-Ball Lens	21-902	5.00 ±0.1	B270	Half-Ball Lens	2.50 ±0.15	Uncoated	1.523	2.50	360 - 2700
5mm Diameter, Truncated B270 Half-Ball Lens	21-903	5.00 ±0.1	B270	Half-Ball Lens	2.20 ±0.15	Uncoated	1.523	2.50	360 - 2700
5mm Diameter, Extended B270 Half-Ball Lens	21-904	5.00 ±0.1	B270	Half-Ball Lens	2.80 ±0.15	Uncoated	1.523	2.50	360 - 2700
6mm Diameter B270 Half-Ball Lens	21-905	6.00 ±0.1	B270	Half-Ball Lens	3.00 ±0.15	Uncoated	1.523	3.00	360 - 2700
6mm Diameter, Truncated B270 Half-Ball Lens	21-906	6.00 ±0.1	B270	Half-Ball Lens	2.70 ±0.15	Uncoated	1.523	3.00	360 - 2700
6mm Diameter, Extended B270 Half-Ball Lens	21-907	6.00 ±0.1	B270	Half-Ball Lens	3.30 ±0.15	Uncoated	1.523	3.00	360 - 2700