Infinity corrected plan achromatic microscope objectives are ideal for collimating and focusing laser beams in the visible spectrum. High precision optical fabrication and assembly in a class 10,000 cleanroom, make these lenses excellent choices for standard laboratory applications.
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LIO-4X Microscope Objective Lens, Infinity Corrected, 4x, 0.1 NA, 15.0 mm WD |
In Stock
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$113.00 |
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LIO-10X Microscope Objective Lens, Infinity Corrected, 10x, 0.25 NA, 10.8 mm WD |
In Stock
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$131.00 |
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LIO-20X Microscope Objective Lens, Infinity Corrected, 20x, 0.40 NA, 1.5 mm WD |
In Stock
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$146.00 |
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LIO-40X Microscope Objective Lens, Infinity Corrected, 40x, 0.65 NA, 0.8 mm WD |
In Stock
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$158.00 |
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LIO-60X Microscope Objective Lens, Infinity Corrected, 60x, 0.85 NA, 0.3 mm WD |
In Stock
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$190.00 |
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| Models |
$113.00
In Stock
Product Series Overview
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$131.00
In Stock
Product Series Overview
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$146.00
In Stock
Product Series Overview
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$158.00
In Stock
Product Series Overview
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$190.00
In Stock
Product Series Overview
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| Magnification | 4x | 10x | 20x | 40x | 60x |
| Numerical Aperture | 0.1 | 0.25 | 0.4 | 0.65 | 0.85 |
| Effective Focal Length (EFL) | 45 mm | 18 mm | 9 mm | 4.5 mm | 3 mm |
| Working Distance | 15 mm | 10.8 mm | 1.5 mm | 0.8 mm | 0.3 mm |
| Wavelength Range | 400-700 nm | 400-700 nm | 400-700 nm | 400-700 nm | 400-700 nm |
| Design Tube Lens Focal Length | 180 mm | 180 mm | 180 mm | 180 mm | 180 mm |
| Field Number | 22 mm | 22 mm | 22 mm | 22 mm | 22 mm |
| Cover Glass Thickness | 0.17 mm | 0.17 mm | 0.17 mm | 0.17 mm | 0.17 mm |
| Thread Type | 0.800-36 RMS | 0.800-36 RMS | 0.800-36 RMS | 0.800-36 RMS | 0.800-36 RMS |
Infinity corrected objectives are used in a wide variety of imaging and laser focusing applications. Light rays leaving the objective’s rear aperture are collimated, so that for imaging applications, a secondary lens (usually called a tube lens) is needed in order to focus the collected light from the specimen onto the sensor. The labeled magnification is calculated, assuming the objective is being used with a tube lens of a particular focal length by design. When a tube lens of a different focal length is used, the magnification will need to be adjusted accordingly. As an advantage over finite conjugate objective lenses, a variety of auxiliary optical components, such as optical filters and polarizers can be inserted between the infinity objective lens and the tube lens without altering how the beam propagates and forms the image down the optical path. In laser applications such as optical tweezers and laser cutting, laser beams entering the rear aperture of an infinity objective can be tightly focused to a diffraction-limited spot, providing concentrated optical power and excellent resolution.
Designed for diffraction limited performance across the entire visible spectrum, our LI series objectives allow collimated beams from lasers such as HeNe, Argon, or frequency double Nd:YAG to be focused to a small spot size. Our microscope objectives are broadband AR coated so that maximum about of light will be transmitted.
The LI series of microscope objectives can be used with the 900 series spatial filter system. By selecting an objective and corresponding pinhole, the laser beam can be spatial filtered such that the output beam quality is better. For a tutorial on spatial filters see Spatial Filter Technical Note.
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