Name: 90mm Dia x 849.9mm FL Achromatic Lens, Mtd
Brand: TECHSPEC
SKU: 54-567
Price: NT$20,913

Diameter (mm):

90.00 +0.00/-0.08

Effective Focal Length EFL (mm):

849.96

Focal Length Tolerance (%):

±1

Back Focal Length BFL (mm):

838.69

Focal Length Specification Wavelength (nm):

587.6

Clear Aperture CA (mm):

72.00

Centering (arcmin):

5.00

Center Thickness CT 1 (mm):

13.08

Center Thickness CT 2 (mm):

10.16

Radius R₁ (mm):

497.21

Radius R₂ (mm):

-345.82

Radius R₃ (mm):

-344.20

Radius R₄ (mm):

-1227.86

Edge Thickness ET (mm):

23.07

N-BK7 / N-SF2

Surface Quality:

60-40

f/#:

11.1

Numerical Aperture NA:

0.05

Coating:

MgF₂ (400-700nm)

Coating Specification:

R_avg ≤1.75% @ 400 - 700nm

Mount Thickness (mm):

28.07

Mounting Threads:

M86 x 1.0

Construction:

Mounted, Airspaced 0.10mm

Bevel:

Protective bevel as needed

Type:

Achromatic Lens

Wavelength Range (nm):

400 - 700

Regulatory Compliance

RoHS:

Compliant

Certificate of Conformance:

View

產品系列說明

提供黏合或空氣鏡間設計
提供轉接版本以便輕鬆整合
採用 MgF₂ 抗反射鍍膜

TECHSPEC® 大型精密消色差透鏡可在指定的波長範圍內，提供近繞射極限效能。這類顏色校正消色差透鏡具有長焦距，並提供黏合或空氣鏡間設計。轉接版本設置公轉接螺紋，可輕鬆整合至光學系統。其中隨附背膠箔片間隔環安裝說明，適用於非轉接版本的空氣鏡間消色差透鏡。