MgF₂ Visible Visible Antireflection Coated N-BK7 Plano-Convex Lenses

Products
Features
Mounting Options
Resources
Contact Us

Overview

Our 400-700 nm N-BK7 precision plano-convex lenses are polished to tight tolerances using master test plates to ensure minimum wavefront distortion for demanding laser electro-optic focusing applications. They feature our MgF₂ broadband antireflection coating for 400 to 700 nm applications.

400-700 nm MgF₂ anti-reflection coating
40-20 or 60-40 scratch-dig N-BK7 substrates
Plano-Convex shape for focusing applications
Standardized focal lengths across different lens sizes
RoHS Certified

See All Features

Products

Showing 93 of 93 total products

Compatibility:

Show entries

Search:

Compare	Model	Diameter	Effective Focal Length (EFL)	F/#	Surface Quality	Availability	Price	Brand
KPX010-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 6.4 mm EFL, 400-700 nm $40.00 In Stock	KPX010-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 6.4 mm EFL, 400-700 nm	6.35 mm	6.4 mm	1	40-20 scratch-dig	In Stock	$40.00	Newport
KPX013-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 12.7 mm EFL, 400-700 nm $40.00 In Stock	KPX013-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 12.7 mm EFL, 400-700 nm	6.35 mm	12.7 mm	2	40-20 scratch-dig	In Stock	$40.00	Newport
KPX016-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 19.0 mm EFL, 400-700 nm $40.00 In Stock	KPX016-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 19.0 mm EFL, 400-700 nm	6.35 mm	19.0 mm	2.9	40-20 scratch-dig	In Stock	$40.00	Newport
KPX019-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 25.4 mm EFL, 400-700 nm $40.00 In Stock	KPX019-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 25.4 mm EFL, 400-700 nm	6.35 mm	25.4 mm	4	40-20 scratch-dig	In Stock	$40.00	Newport
KPX022-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 38.1 mm EFL, 400-700 nm $40.00 In Stock	KPX022-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 38.1 mm EFL, 400-700 nm	6.35 mm	38.1 mm	6	40-20 scratch-dig	In Stock	$40.00	Newport
KPX025-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 50.2 mm EFL, 400-700 nm $40.00 Show	KPX025-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 50.2 mm EFL, 400-700 nm	6.35 mm	50.2 mm	7.9	40-20 scratch-dig	Show	$40.00	Newport
KPX028-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 75.6 mm EFL, 400-700 nm $40.00 In Stock	KPX028-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 75.6 mm EFL, 400-700 nm	6.35 mm	75.6 mm	11.9	40-20 scratch-dig	In Stock	$40.00	Newport
KPX031-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 88.3 mm EFL, 400-700 nm $40.00 In Stock	KPX031-C Plano-Convex Lens, N-BK7, 6.35 mm Diameter, 88.3 mm EFL, 400-700 nm	6.35 mm	88.3 mm	13.9	40-20 scratch-dig	In Stock	$40.00	Newport

Showing 1 to 08 of 93 entries

Previous1 2 3 4 5…12Next

Show All

Specifications

Lens Shape

Plano-Convex
Lens Material

N-BK7
Antireflection Coating

400-700 nm
Coating Type

Visible Single-Layer MgF₂
Coating Code

-C
Damage Threshold

7 J/cm², 10 ns pulses, 20 Hz at 532 nm
Surface Accuracy, Irregularity

λ/4 (40-20 scratch-dig models)
λ/2 (60-40 scratch-dig models)
Surface Accuracy, Power

1.5λ (40-20 scratch-dig models)
2.5λ (60-40 scratch-dig models)

Edge Thickness (T_e)

3.0 mm
Chamfers Angle/Tolerance

45° ±15°, typical
Focal Length Tolerance

±1 % (40-20 scratch-dig models)
±2 % (60-40 scratch-dig models)
Diameter Tolerance

+0/-0.1 mm (40-20 scratch-dig models)
+0/-0.15 mm (60-40 scratch-dig models)
Center Thickness Tolerance

±0.1 mm (40-20 scratch-dig models)
±0.2 mm (60-40 scratch-dig models)
Clear Aperture

≥central 90% of diameter
Cleaning

See How to Clean Optics

Features

N-BK7 Substrates for VIS and NIR Applications

N-BK7 is an excellent lens material for most visible and near infrared applications. It is the most common borosilicate crown optical glass, and it provides great performance at a good value. Its high homogeneity, low bubble and inclusion content, and straightforward manufacturability make it a good choice for transmissive optics. N-BK7 is also relatively hard and shows good scratch resistance. The transmission range for BK 7 is 380 to 2100 nm. It is not recommended for temperature sensitive applications, such as precision mirrors. For more information, refer to our optical material s technical note.

Uncoated Plano-Convex Lenses Offered in Precision and Economy Versions

Our uncoated precision plano-convex lenses are polished to tight tolerances using master test plates to ensure minimum wavefront distortion, for demanding laser electro-optic focusing applications. Tight surface quality tolerances minimize scatter and unwanted diffraction effects. Our standard precision lenses have a 40-20 scratch-dig surface quality, and a 1.5 λ surface power accuracy. We also offer economy versions of our lenses with a 60-40 scratch-dig surface quality, for excellent quality at a lower price point. For more information, refer to the optical surfaces technical note.

MgF₂ Visible Antireflection Coating

Our single layer Magnesium Fluoride visible AR coating is the most common choice that offers extremely broad wavelength range at a reasonable price. It is standard on achromats and optional on our N-BK7 plano-convex spherical lenses and cylindrical lenses. Comparing to the uncoated surface, the MgF₂ provides a significant improvement by reducing the reflectance to less than 1.5%. It works extremely well over a wide range of wavelengths (400 nm to 700 nm) at angles of incidence less than 15 degrees.

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.

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 (T_e) 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	(M- Model: M-LH-3A Fixed Lens Mount, 3.0 in. (76.2 mm) Diameter, M4 Thread, A-LINE $69.00 In Stock See Full Product Details Product Series Overview A-Line Fixed Lens Mounts ) LH-3A Model: LH-3A Fixed Lens Mount, 3.0 in. (76.2 mm), 8-32 Thread, A-LINE $69.00 1 Week See Full Product Details Product Series Overview A-Line Fixed Lens Mounts	N/A	N/A	N/A
50.8 mm	(M- Model: M-LH-2A Fixed Lens Mount, Ø2.0 in. (50.8 mm), M4 Thread, A-LINE $36.00 In Stock See Full Product Details Product Series Overview A-Line Fixed Lens Mounts ) LH-2A Model: LH-2A Fixed Lens Mount, 2.0 in. (50.8 mm), 8-32 Thread, A-LINE $36.00 In Stock See Full Product Details Product Series Overview A-Line Fixed Lens Mounts LH-2N Model: LH-2N Lens Mount, Insertable, 50.8 mm Diameter, A-LINE $42.00 In Stock See Full Product Details Product Series Overview A-Line™ Insertable Fixed Lens Mounts	LT20-05 Model: LT20-05 Lens Tube, 2 inch LT Series, 1/2 inch length $36.00 In Stock See Full Product Details Product Series Overview Lens Tubes LT20-10 Model: LT20-10 Lens Tube, 2 inch LT Series, 1 inch length $39.00 In Stock See Full Product Details Product Series Overview Lens Tubes LT20-20 Model: LT20-20 Lens Tube, 2 inch LT Series, 2 inch length $42.00 In Stock See Full Product Details Product Series Overview Lens Tubes LT20-30 Model: LT20-30 Lens Tube, 2 inch dia. LT Series, 3 inch length $47.00 In Stock See Full Product Details Product Series Overview Lens Tubes	LP-2A Model: LP-2A Precision Lens Positioner, 2.0 in., 100 TPI XYθXθY, 80 TPI Z $1,088.00 In Stock See Full Product Details Product Series Overview Precision Multi-Axis Lens Positioners LP-2A-XY Model: LP-2A-XY Precision Lens Positioner, 2.0 in. Diameter, 100 TPI XY $702.00 In Stock See Full Product Details Product Series Overview Precision Multi-Axis Lens Positioners LP-2A-XYZ Model: LP-2A-XYZ Precision Lens Positioner, 2.0 in., 100 TPI XY, 80 TPI Z $785.00 In Stock See Full Product Details Product Series Overview Precision Multi-Axis Lens Positioners	N/A
38.1 mm	(M- Model: M-LH-1.5A Fixed Lens Mount, 1.5 in. (38.1 mm) Diameter, M4 Thread, A-LINE $34.00 In Stock See Full Product Details Product Series Overview A-Line Fixed Lens Mounts ) LH-1.5A Model: LH-1.5A Fixed Lens Mount, 1.5 in. (38.1 mm) Diameter, 8-32 Thread, A-LINE $34.00 In Stock See Full Product Details Product Series Overview A-Line Fixed Lens Mounts	LT20 lens tube with LH-2R1.5 Model: LH-2R1.5 Lens Adaptor, 2.0 in. Mount to 1.5 in. Diameter Lens, A-LINE $31.00 In Stock See Full Product Details Product Series Overview A-Line Fixed Lens Mounts adapter	LP-2 lens positioner with LPLH-1.5T Model: LPLH-1.5T Optic Holder, 1.5 in. Diameter, 2.063-20 Thread, For LP-2A Series $97.00 In Stock See Full Product Details Product Series Overview Precision Multi-Axis Lens Positioners adapter	N/A
25.4 mm	(M- Model: M-LH-1A Fixed Lens Mount, Ø1.0 in. (25.4 mm), M4 Thread, A-LINE $20.00 In Stock See Full Product Details Product Series Overview A-Line Fixed Lens Mounts ) LH-1A Model: LH-1A Fixed Lens Mount, 1.0 in. (25.4 mm) Diameter, 8-32 Thread, A-LINE $20.00 In Stock See Full Product Details Product Series Overview A-Line Fixed Lens Mounts LH-1N Model: LH-1N Lens Mount, Insertable, 25.4 mm Diameter, A-LINE $29.00 In Stock See Full Product Details Product Series Overview A-Line™ Insertable Fixed Lens Mounts LH-1XY Model: LH-1XY XY Lens Mount, Insertable, 25.4 mm, A-LINE $185.00 In Stock See Full Product Details Product Series Overview A-Line Adjustable Optic Mounts LH-1TZ-A Model: LH-1TZ-A Fine Focusing Lens Mount, 1.0 in., Screw Drive, 8-32 and M4, A-LINE $230.00 In Stock See Full Product Details Product Series Overview A-Line Adjustable Optic Mounts LH-1TZ Model: LH-1TZ Fine Focusing Lens Mount, 1.0 in., Micrometer Drive, 8-32 and M4, A-LINE $258.00 In Stock See Full Product Details Product Series Overview A-Line Adjustable Optic Mounts	LT10-05 Model: LT10-05 Lens Tube, 1 inch LT Series, 1/2 inch length $20.00 In Stock See Full Product Details Product Series Overview Lens Tubes LT10-10 Model: LT10-10 Lens Tube, 1 inch LT Series, 1 inch length $23.00 In Stock See Full Product Details Product Series Overview Lens Tubes LT10-20 Model: LT10-20 Lens Tube, 1 inch LT Series, 2 inch length $24.00 In Stock See Full Product Details Product Series Overview Lens Tubes LT10-30 Model: LT10-30 Lens Tube, 1 inch LT Series, 3 inch length $36.00 In Stock See Full Product Details Product Series Overview Lens Tubes	LP-1A Model: LP-05A Precision Lens Positioner, 0.5 in., 100 TPI XYθXθY, 80 TPI Z $749.00 1 Week See Full Product Details Product Series Overview Precision Multi-Axis Lens Positioners LP-1A-XY Model: LP-1A-XY Precision Lens Positioner, 1.0 in. Diameter, 100 TPI XY $600.00 In Stock See Full Product Details Product Series Overview Precision Multi-Axis Lens Positioners LP-1A-XYZ Model: LP-1A-XYZ Precision Lens Positioner, 1.0 in., 100 TPI XY, 80 TPI Z $722.00 In Stock See Full Product Details Product Series Overview Precision Multi-Axis Lens Positioners	OC1-LH1-S Model: OC1-LH1-S Lens Mount, Standard, 1 in. Diameter, Optics Cage Plus $38.00 In Stock See Full Product Details Product Series Overview Optics Cage Plus Fixed Optic Mounts OC1-LH1 Model: OC1-LH1 Lens Mount, Insertable, 1 in. Diameter, Optics Cage Plus $24.00 In Stock See Full Product Details Product Series Overview Optics Cage Plus Fixed Optic Mounts OC1-LH1-TZ Model: OC1-LH1-TZ Lens Mount, Insertable, 1 in. Diameter, Optics Cage Plus, Requires OC1-TZ $56.00 In Stock See Full Product Details Product Series Overview Optics Cage Plus Adjustable Mounts OC1-LH1-XY Model: OC1-LH1-XY Adjustable Lens Mount, Insertable, XY Fine, 25.4 mm Diameter, 1 in. Optics Cage Plus $243.00 In Stock See Full Product Details Product Series Overview Optics Cage Plus Adjustable Mounts OC1-LH1-XYA Model: OC1-LH1-XYA Adjustable Lens Mount, Insertable, XYθXθY Fine, 25.4 mm Diameter, 1 in. Optics Cage Plus $285.00 In Stock See Full Product Details Product Series Overview Optics Cage Plus Adjustable Mounts OC1-LH1-XYC Model: OC1-LH1-XYC Adjustable Lens Mount, Insertable, XY Coarse, 25.4 mm Diameter, 1 in. Optics Cage Plus $100.00 In Stock See Full Product Details Product Series Overview Optics Cage Plus Adjustable Mounts OC1-LH1-XYZ Model: OC1-LH1-XYZ Adjustable Lens Mount, Insertable, XYZ Fine, 25.4 mm Diameter, 1 in. Optics Cage Plus $433.00 In Stock See Full Product Details Product Series Overview Optics Cage Plus Adjustable Mounts
12.7 mm	(M- Model: M-LH-0.5A Fixed Lens Mount, 0.50 in. (12.7 mm) Diameter, M4 Thread, A-LINE $20.00 In Stock See Full Product Details Product Series Overview A-Line Fixed Lens Mounts ) LH-0.5A Model: LH-0.5A Fixed Lens Mount, 0.50 in. (12.7 mm) Diameter, 8-32 Thread, A-LINE $20.00 In Stock See Full Product Details Product Series Overview A-Line Fixed Lens Mounts LH-05N Model: LH-05N Lens Mount, Insertable, 12.7 mm Diameter, A-LINE $26.00 In Stock See Full Product Details Product Series Overview A-Line™ Insertable Fixed Lens Mounts	LT05-05 Model: LT05-05 Lens Tube, 1/2 inch diameter lenses, 1/2 inch length $19.40 In Stock See Full Product Details Product Series Overview Lens Tubes LT05-10 Model: LT05-10 Lens Tube, 1/2 inch diameter lenses, 1 inch length $21.00 In Stock See Full Product Details Product Series Overview Lens Tubes	LP-05A Model: LP-05A Precision Lens Positioner, 0.5 in., 100 TPI XYθXθY, 80 TPI Z $749.00 1 Week See Full Product Details Product Series Overview Precision Multi-Axis Lens Positioners LP-05A-XY Model: LP-05A-XY Precision Lens Positioner, 0.5 in. Diameter, 100 TPI XY $456.00 In Stock See Full Product Details Product Series Overview Precision Multi-Axis Lens Positioners LP-05A-XYZ Model: LP-05A-XYZ Precision Lens Positioner, 0.5 in., 100 TPI XY, 80 TPI Z $544.00 In Stock See Full Product Details Product Series Overview Precision Multi-Axis Lens Positioners	N/A
6.35 mm	LH-05DB Model: LH-05DB Mirror Mount, Fixed, 12.7 mm Diameter, 8-32 Thread, A-LINE $20.00 2 Weeks See Full Product Details Product Series Overview A-Line Fixed Optic Mounts with LH-50R25 Model: LH-50R25 Lens Adaptor, 0.5 in. Mount to 0.25 in. Diameter Lens, A-LINE $23.00 In Stock See Full Product Details Product Series Overview A-Line Fixed Lens Mounts adapter	LT05 lens tube with LH-50R25 Model: LH-50R25 Lens Adaptor, 0.5 in. Mount to 0.25 in. Diameter Lens, A-LINE $23.00 In Stock See Full Product Details Product Series Overview A-Line Fixed Lens Mounts adapter	LP-05 lens positioner with LPLH-25T Model: LPLH-25T Optic Holder, 0.25 in. Diameter, 0.875-20 Thread, For LP-05A Series $43.00 In Stock See Full Product Details Product Series Overview Precision Multi-Axis Lens Positioners adapter	N/A