Achromatic Objectives

An advantage of additional lens elements is the ability to combine lenses of different materials and optical properties to correct for chromatic aberrations. Achromatic focusing objectives are aberration corrected at two wavelengths simultaneously. A doublet consisting of two lenses of different materials can be designed such that the effective focal length and performance will be the same at two separate wavelengths.

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Model Description
54-100-576 Aberration Corrected at Two Wavelengths Simultaneously
Specs & Docs
Specifications
Aperture (mm) 100
Back Focal Length (mm) 563.5
Effective Focal Length (mm) 575.5
F/# 5.7
Outside Diameter (mm) 120.7
Wavelength Range (nm) 480/650
54-74-210 Aberration Corrected at Two Wavelengths Simultaneously
Specs & Docs
Specifications
Aperture (mm) 74
Back Focal Length (mm) 189.4
Effective Focal Length (mm) 210.0
F/# 2.8
Outside Diameter (mm) 88.9
Wavelength Range (nm) 532/1064
54-50-175 Aberration Corrected at Two Wavelengths Simultaneously
Specs & Docs
Specifications
Aperture (mm) 50
Back Focal Length (mm) 143.5
Effective Focal Length (mm) 175.0
F/# 3.5
Outside Diameter (mm) 60.0
Wavelength Range (nm) 488/514
54-25-88N Aberration Corrected at Two Wavelengths Simultaneously
Specs & Docs
Specifications
Aperture (mm) 25
Back Focal Length (mm) 94.1
Effective Focal Length (mm) -88.0
F/# -3.5
Outside Diameter (mm) 33.3
Wavelength Range (nm) 488/514
54-75-250 Aberration Corrected at Two Wavelengths Simultaneously
Specs & Docs
Specifications
Aperture (mm) 75
Back Focal Length (mm) 210.6
Effective Focal Length (mm) 250.0
F/# 3.5
Outside Diameter (mm) 88.6
Wavelength Range (nm) 488/514
54-10-120 Aberration Corrected at Two Wavelengths Simultaneously
Specs & Docs
Specifications
Aperture (mm) 10
Back Focal Length (mm) 115.0
Effective Focal Length (mm) 120.0
F/# 12.0
Outside Diameter (mm) 15.0
Wavelength Range (nm) 266/532
54-100-200 Aberration Corrected at Two Wavelengths Simultaneously
Specs & Docs
Specifications
Aperture (mm) 100
Back Focal Length (mm) 182.5
Effective Focal Length (mm) 200.5
F/# 2.0
Outside Diameter (mm) 120.7
Wavelength Range (nm) 450/600
54-120-260 Aberration Corrected at Two Wavelengths Simultaneously
Specs & Docs
Specifications
Aperture (mm) 120
Back Focal Length (mm) 231.5
Effective Focal Length (mm) 258.0
F/# 2.2
Outside Diameter (mm) 120.7
Wavelength Range (nm) 450/600
54-200-1193 Aberration Corrected at Two Wavelengths Simultaneously
Specs & Docs
Specifications
Aperture (mm) 200
Back Focal Length (mm) 1150.2
Effective Focal Length (mm) 1192.7
F/# 5.9
Outside Diameter (mm) 208.0
Wavelength Range (nm) 500/650
54-50-175N Aberration Corrected at Two Wavelengths Simultaneously
Specs & Docs
Specifications
Aperture (mm) 50
Back Focal Length (mm) 186.1
Effective Focal Length (mm) -175.0
F/# -3.5
Outside Diameter (mm) 60.0
Wavelength Range (nm) 488/514
54-37-117 Aberration Corrected at Two Wavelengths Simultaneously
Specs & Docs
Specifications
Aperture (mm) 37
Back Focal Length (mm) 109.4
Effective Focal Length (mm) 117.4
F/# 3.2
Outside Diameter (mm) 50.8
Wavelength Range (nm) 532/1064
54-106-370 Aberration Corrected at Two Wavelengths Simultaneously
Specs & Docs
Specifications
Aperture (mm) 106
Back Focal Length (mm) 305.2
Effective Focal Length (mm) 370.0
F/# 3.5
Outside Diameter (mm) 119.4
Wavelength Range (nm) 488/514
54-30-60 Aberration Corrected at Two Wavelengths Simultaneously
Specs & Docs
Specifications
Aperture (mm) 30
Back Focal Length (mm) 48.5
Effective Focal Length (mm) 62.3
F/# 2.0
Outside Diameter (mm) 41.3
Wavelength Range (nm) 532/1064
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