Compare Model Drawings, CAD & Specs Diameter Effective Focal Length (EFL) F/# Availability Price
Focusing Lens, Plano-Convex, 38.1 mm, UVFS, 50 mm EFL, Uncoated
$258
In Stock
38.1 mm 50.0 mm 1.3
In Stock
Focusing Lens, Plano-Convex, 38.1 mm, UVFS, 100 mm EFL, Uncoated
$369
38.1 mm 100 mm 2.6
Focusing Lens, Plano-Convex, 38.1 mm, UVFS, 125 mm EFL, Uncoated
$265
In Stock
38.1 mm 125 mm 3.3
In Stock
Focusing Lens, Plano-Convex, 38.1 mm, UVFS, 150 mm EFL, Uncoated
$246
In Stock
38.1 mm 150 mm 4
In Stock
Focusing Lens, Plano-Convex, 38.1 mm, UVFS, 200 mm EFL, Uncoated
$248
38.1 mm 200 mm 5.2
Plano-Convex Lens, Fused Silica, 6.35 mm, 12.7 mm EFL, Uncoated
$157
In Stock
6.35 mm 12.7 mm 2
In Stock
Plano-Convex Lens, Fused Silica, 12.7 mm, 16.0 mm EFL, Uncoated
$159
In Stock
12.7 mm 16.0 mm 1.3
In Stock
Plano-Convex Lens, Fused Silica, 12.7 mm, 19.0 mm EFL, Uncoated
$159
In Stock
12.7 mm 19.0 mm 1.5
In Stock
Plano-Convex Lens, Fused Silica, 12.7 mm, 25.4 mm EFL, Uncoated
$159
In Stock
12.7 mm 25.4 mm 2
In Stock
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 33.0 mm EFL, Uncoated
$175
3 Weeks
25.4 mm 33.0 mm 1.3
3 Weeks
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 38.1 mm EFL, Uncoated
$175
In Stock
25.4 mm 38.1 mm 1.5
In Stock
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 50.2 mm EFL, Uncoated
$172
In Stock
25.4 mm 50.2 mm 2
In Stock
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 62.9 mm EFL, Uncoated
$172
In Stock
25.4 mm 62.9 mm 2.5
In Stock
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 75.6 mm EFL, Uncoated
$164
In Stock
25.4 mm 75.6 mm 3
In Stock
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 88.3 mm EFL, Uncoated
$164
In Stock
25.4 mm 88.3 mm 3.5
In Stock
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 100 mm EFL, Uncoated
$117
In Stock
25.4 mm 100 mm 3.9
In Stock
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 125 mm EFL, Uncoated
$117
In Stock
25.4 mm 125 mm 4.9
In Stock
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 150 mm EFL, Uncoated
$117
In Stock
25.4 mm 150 mm 5.9
In Stock
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 175 mm EFL, Uncoated
$117
In Stock
25.4 mm 175 mm 6.9
In Stock
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 200 mm EFL, Uncoated
$117
In Stock
25.4 mm 200 mm 7.9
In Stock
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 250 mm EFL, Uncoated
$117
In Stock
25.4 mm 250 mm 9.8
In Stock
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 350 mm EFL, Uncoated
$117
In Stock
25.4 mm 350 mm 13.8
In Stock
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 500 mm EFL, Uncoated
$117
In Stock
25.4 mm 500 mm 19.7
In Stock
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 750 mm EFL, Uncoated
$117
3 Weeks
25.4 mm 750 mm 29.5
3 Weeks
uv fused silica plano-convex lens 1.0 inch (25.4 mm) diameter
Plano-Convex Lens, Fused Silica, 25.4 mm, 1000 mm EFL, Uncoated
$117
In Stock
25.4 mm 1000 mm 39.4
In Stock
Plano-Convex Lens, Fused Silica, 50.8 mm, 75.6 mm EFL, Uncoated
$266
In Stock
50.8 mm 75.6 mm 1.5
In Stock
Plano-Convex Lens, Fused Silica, 50.8 mm, 100 mm EFL, Uncoated
$266
In Stock
50.8 mm 100 mm 2
In Stock
Plano-Convex Lens, Fused Silica, 50.8 mm, 150 mm EFL, Uncoated
$266
In Stock
50.8 mm 150 mm 3
In Stock
Plano-Convex Lens, Fused Silica, 50.8 mm, 200 mm EFL, Uncoated
$266
In Stock
50.8 mm 200 mm 3.9
In Stock
Plano-Convex Lens, Fused Silica, 50.8 mm, 250 mm EFL, Uncoated
$266
In Stock
50.8 mm 250 mm 4.9
In Stock
Plano-Convex Lens, Fused Silica, 50.8 mm, 300 mm EFL, Uncoated
$266
In Stock
50.8 mm 300 mm 5.9
In Stock
Plano-Convex Lens, Fused Silica, 50.8 mm, 500 mm EFL, Uncoated
$266
In Stock
50.8 mm 500 mm 9.8
In Stock
Plano-Convex Lens, Fused Silica, 12.7 mm, 38.1 mm EFL, Uncoated
$132
In Stock
12.7 mm 38.1 mm 3
In Stock
Plano-Convex Lens, Fused Silica, 12.7 mm, 50.2 mm EFL, Uncoated
$132
In Stock
12.7 mm 50.2 mm 4
In Stock
Plano-Convex Lens, Fused Silica, 12.7 mm, 75.6 mm EFL, Uncoated
$132
In Stock
12.7 mm 75.6 mm 6
In Stock

Specifications

  • Lens Shape
    Plano-Convex
  • Lens Material
    UV Fused Silica
  • Antireflection Coating
    Uncoated
  • Surface Quality
    20-10 scratch-dig
  • Surface Accuracy, Irregularity
    λ/8
  • Surface Accuracy, Power
    1.5 λ
  • Surface Flatness
    λ/8
  • Chamfers
    0–0.8 mm face width
  • Chamfers Angle/Tolerance
    45° ±15°, typical
  • Clear Aperture
    ≥central 90% of diameter
  • Cleaning

Features

UV Fused Silica Substrates for UV, Laserline & Broadband Applications

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

Precision Uncoated Plano-Convex Lens Surfaces

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.

Advantages to Uncoated Lenses

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.

Standardized Plano-Convex Focal Lengths

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 Lens Shape for Focusing Light

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.

Focusing a Collimated Laser Beam

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.

Collimating Light from a Point Source

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.

Mounted Version - with Lens Tubes

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.

Mounting Options

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.

Lens Diameter LH-A-GRP
A-Line™ Lens Mounts
LT_Series_group_update
LT Series Lens Tubes
OM-multi_axis_lens_pos-S
LP Series Lens Positioners
optics-cage-plus-S
Optics Cage Plus Series
76.2 mm (M-) LH-3A N/A N/A N/A
50.8 mm (M-) LH-2A
LH-2N
LT20-05
LT20-10
LT20-20
LT20-30
LP-2A
LP-2A-XY
LP-2A-XYZ
N/A
38.1 mm (M-) LH-1.5A LT20 lens tube with
LH-2R1.5 adapter
LP-2 lens positioner with
LPLH-1.5T adapter
N/A
25.4 mm (M-) LH-1A
LH-1N
LH-1XY
LH-1TZ-A
LH-1TZ
LT10-05
LT10-10
LT10-20
LT10-30
LP-1A
LP-1A-XY
LP-1A-XYZ
OC1-LH1-S
OC1-LH1
OC1-LH1-TZ
OC1-LH1-XY
OC1-LH1-XYA
OC1-LH1-XYC
OC1-LH1-XYZ
12.7 mm (M-) LH-0.5A
LH-05N
LT05-05
LT05-10
LP-05A
LP-05A-XY
LP-05A-XYZ
N/A
6.35 mm LH-05DB with
LH-50R25 adapter
LT05 lens tube with
LH-50R25 adapter
LP-05 lens positioner with
LPLH-25T adapter
N/A

For non-standard sizes not listed above, check out our variable size lens mounts.