Our uncoated UV grade fused silica plano-convex lenses are designed to meet the demanding requirements of laser electro-optic focusing applications. These lenses are polished to tight tolerances using master test plates to ensure minimum wavefront distortion. Tight surface quality tolerances minimize scatter and unwanted diffraction effects.
| Compare | Model | Drawings, CAD & Specs | Availability | Price | |||
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41540 Focusing Lens, Plano-Convex, 38.1 mm, UVFS, 50 mm EFL, Uncoated |
In Stock
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$260 |
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41560 Focusing Lens, Plano-Convex, 38.1 mm, UVFS, 100 mm EFL, Uncoated |
In Stock
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$380 |
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41565 Focusing Lens, Plano-Convex, 38.1 mm, UVFS, 125 mm EFL, Uncoated |
In Stock
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$250 |
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41570 Focusing Lens, Plano-Convex, 38.1 mm, UVFS, 150 mm EFL, Uncoated |
In Stock
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$240 |
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41580 Focusing Lens, Plano-Convex, 38.1 mm, UVFS, 200 mm EFL, Uncoated |
In Stock
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$255 |
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SPX010 Plano-Convex Lens, Fused Silica, 6.35 mm, 12.7 mm EFL, Uncoated |
In Stock
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$165 |
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SPX011 Plano-Convex Lens, Fused Silica, 12.7 mm, 16.0 mm EFL, Uncoated |
In Stock
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$167 |
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SPX012 Plano-Convex Lens, Fused Silica, 12.7 mm, 19.0 mm EFL, Uncoated |
3 Weeks
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$167 |
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SPX013 Plano-Convex Lens, Fused Silica, 12.7 mm, 25.4 mm EFL, Uncoated |
In Stock
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$167 |
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SPX014 Plano-Convex Lens, Fused Silica, 25.4 mm, 33.0 mm EFL, Uncoated |
In Stock
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$184 |
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SPX015 Plano-Convex Lens, Fused Silica, 25.4 mm, 38.1 mm EFL, Uncoated |
In Stock
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$184 |
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SPX016 Plano-Convex Lens, Fused Silica, 25.4 mm, 50.2 mm EFL, Uncoated |
In Stock
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$181 |
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SPX017 Plano-Convex Lens, Fused Silica, 25.4 mm, 62.9 mm EFL, Uncoated |
In Stock
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$181 |
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SPX019 Plano-Convex Lens, Fused Silica, 25.4 mm, 75.6 mm EFL, Uncoated |
In Stock
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$172 |
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SPX020 Plano-Convex Lens, Fused Silica, 25.4 mm, 88.3 mm EFL, Uncoated |
5 Weeks
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$172 |
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SPX022 Plano-Convex Lens, Fused Silica, 25.4 mm, 100 mm EFL, Uncoated |
In Stock
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$123 |
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SPX023 Plano-Convex Lens, Fused Silica, 25.4 mm, 125 mm EFL, Uncoated |
In Stock
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$123 |
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SPX025 Plano-Convex Lens, Fused Silica, 25.4 mm, 150 mm EFL, Uncoated |
3 Weeks
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$123 |
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SPX026 Plano-Convex Lens, Fused Silica, 25.4 mm, 175 mm EFL, Uncoated |
3 Weeks
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$123 |
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SPX028 Plano-Convex Lens, Fused Silica, 25.4 mm, 200 mm EFL, Uncoated |
3 Weeks
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$123 |
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SPX029 Plano-Convex Lens, Fused Silica, 25.4 mm, 250 mm EFL, Uncoated |
3 Weeks
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$123 |
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SPX030 Plano-Convex Lens, Fused Silica, 25.4 mm, 350 mm EFL, Uncoated |
In Stock
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$123 |
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SPX031 Plano-Convex Lens, Fused Silica, 25.4 mm, 500 mm EFL, Uncoated |
In Stock
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$123 |
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SPX032 Plano-Convex Lens, Fused Silica, 25.4 mm, 750 mm EFL, Uncoated |
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$123 |
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SPX034 Plano-Convex Lens, Fused Silica, 25.4 mm, 1000 mm EFL, Uncoated |
In Stock
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$123 |
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SPX040 Plano-Convex Lens, Fused Silica, 50.8 mm, 75.6 mm EFL, Uncoated |
In Stock
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$279 |
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SPX043 Plano-Convex Lens, Fused Silica, 50.8 mm, 100 mm EFL, Uncoated |
In Stock
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$279 |
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SPX046 Plano-Convex Lens, Fused Silica, 50.8 mm, 150 mm EFL, Uncoated |
In Stock
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$279 |
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SPX049 Plano-Convex Lens, Fused Silica, 50.8 mm, 200 mm EFL, Uncoated |
In Stock
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$279 |
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SPX052 Plano-Convex Lens, Fused Silica, 50.8 mm, 250 mm EFL, Uncoated |
In Stock
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$279 |
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SPX055 Plano-Convex Lens, Fused Silica, 50.8 mm, 300 mm EFL, Uncoated |
In Stock
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$279 |
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SPX058 Plano-Convex Lens, Fused Silica, 50.8 mm, 500 mm EFL, Uncoated |
In Stock
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$279 |
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SPX113 Plano-Convex Lens, Fused Silica, 12.7 mm, 38.1 mm EFL, Uncoated |
In Stock
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$139 |
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SPX114 Plano-Convex Lens, Fused Silica, 12.7 mm, 50.2 mm EFL, Uncoated |
In Stock
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$139 |
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SPX115 Plano-Convex Lens, Fused Silica, 12.7 mm, 75.6 mm EFL, Uncoated |
In Stock
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$139 |
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UV Grade Fused Silica is synthetic amorphous silicon dioxide of extremely high purity providing maximum transmission from 195 to 2100 nm. This non-crystalline, colorless silica glass combines a very low thermal expansion coefficient with good optical qualities, and excellent transmittance in the ultraviolet region. Transmission and homogeneity exceed those of crystalline quartz without the problems of orientation and temperature instability inherent in the crystalline form. It will not fluoresce under UV light and is resistant to radiation. For high-energy applications, the extreme purity of fused silica eliminates microscopic defect sites that could lead to laser damage. For more information, refer to our optical materials Technical Note
Our uncoated precision plano-convex lenses are polished to tight tolerances minimizing wavefront distortion. Tight surface quality tolerances minimize scatter and unwanted diffraction effects. Our standard lenses have a 20-10 scratch-dig surface quality, and a 1.5 λ surface power accuracy. For more information, refer to the optical surfaces technical note.
Uncoated lenses are used in optical systems and devices because they have an exceptionally wide wavelength range, a high damage threshold ratio, and without the expense of coatings, are always less expensive than their coated counterparts. Further, uncoated lenses give camera images a “vintage” look, which is becoming popular in cinema film production.
Standard effective focal lengths across a variety of newport lens sizes, materials and shapes provide a systematic approach allowing for lenses of different sizes to be interchanged without requiring other changes to your optical system. Collimating a point light source coming from the planar surface or focusing a collimated light source which is incident on the curved surface will help to minimize the spherical aberration.
Plano-Convex lenses are the best choice for focusing parallel rays of light to a single point. They can be used to focus, collect and collimate light. The asymmetry of this lens shape minimizes spherical aberration in situations where the object and image are located at unequal distance from the lens. The optimum case is where the object is placed at infinity with parallel rays entering lens and the final image is a focused point.
For an application example, let’s look at the case of the output from a Newport R-31005 HeNe laser focused to a spot using a KPX043 Plano-Convex Lens. This Hene laser has a beam diameter of 0.63 mm and a divergence of 1.3 mrad. Note that these are beam diameter and full divergence, so in the notation of our figure, y1 = 0.315 mm and θ1 = 0.65 mrad. The KPX043 lens has a focal length of 25.4 mm. Thus, at the focused spot, we have a radius θ1f = 16.5 µm. So, the diameter of the spot will be 33 µm.
Since a common application is the collimation of the output from an Optical Fiber, let’s use that for our numerical example. The Newport F-MBB fiber has a core diameter of 200 µm and a numerical aperture (NA) of 0.37. The radius y1 of our source is then 100 µm. NA is defined in terms of the half-angle accepted by the fiber, so θ1 = 0.37. If we again use the KPX043 , 25.4 mm focal length lens to collimate the output, we will have a beam with a radius of 9.4 mm and a half-angle divergence of 4 mrad.
The lenses can be mounted in LT series lens tube for constructing a complex optical system or quickly connecting to other threaded lens mounts: A-Line™ series fixed lens mount, or adjustable lens positioner (with thread adapter). Use LT-WR series spanner wrench for easy lens installation.
We offer a full range of optical lens mounts to meet various experimental requirements. Below lists the recommended mounts for spherical lenses of standard sizes. Please see our Lens Mount Guide for additional information.
Note: besides the diameter, please check the Edge Thickness (Te) specification of the lens and the lens mount to ensure compatibility before purchasing.
| Lens Diameter |  A-Line™ Lens Mounts |
 LT Series Lens Tubes |
 LP Series Lens Positioners |
 Optics Cage Plus Series |
|---|---|---|---|---|
| 76.2 mm | ( |
N/A | N/A | N/A |
| 50.8 mm | ( |
N/A | ||
| 38.1 mm | ( |
LT20 lens tube with |
LP-2 lens positioner with |
N/A |
| 25.4 mm | ( |
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| 12.7 mm | ( |
N/A | ||
| 6.35 mm | LT05 lens tube with |
LP-05 lens positioner with |
N/A |
For non-standard sizes not listed above, check out our variable size lens mounts.
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