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檢視所有 25 產品系列

25mm Dia x -150mm FL Negative Doublet Lens MgF2 Coated

Diameter (mm):
25.00 +0.0/-0.025
Effective Focal Length EFL (mm):
-150.00
Focal Length Tolerance (%):
±2
Back Focal Length BFL (mm):
-152.63
Focal Length Specification Wavelength (nm):
587.6
Clear Aperture CA (mm):
24.00
Centering (arcmin):
<1
Center Thickness CT 1 (mm):
2.50
Center Thickness CT 2 (mm):
4.06
Center Thickness Tolerance (mm):
±0.2
Radius R1 (mm):
-92.30
Radius R2 (mm):
68.87
Radius R3 (mm):
204.15
Edge Thickness ET (mm):
7.73
Substrate:
N-BK7 / N-SF5
Surface Quality:
40-20
f/#:
6.00
Numerical Aperture NA:
0.08
Coating:
MgF2 (400-700nm)
Coating Specification:
Ravg ≤1.75% @ 400 - 700nm
Power (P-V) @ 632.8nm:
1.5λ
Irregularity (P-V) @ 632.8nm:
λ/4
Bevel:
Protective bevel as needed
Type:
Negative Achromatic Lens
Wavelength Range (nm):
400 - 700
RoHS:

產品系列說明

TECHSPEC® MgF2 鍍膜負消色差透鏡由兩個黏合在一起的光學元件組成。負膠合雙透鏡針對色彩及軸上像差進行校正。TECHSPEC MgF2 鍍膜負消色差透鏡主要作為巴洛鏡頭,用於延伸焦距。這類透鏡通常搭配使用正消色差反射鏡系統及成像鏡頭。

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