Sellwell Optics Manufacturing Ltd.

We Are Dedicated To Design & Manufacturing Aspheric Lenses

Precision Glass Molded

Ideal for high volume production requirements because rapid production of many lenses allows for amortization of large up-front tooling charges.

Precision Polished

Ideal for prototypes or low to mid-volume requirements because of short lead times and low tooling costs. Also ideal for the highest performance requirements.

Polymer Molded

An ideal alternative to Glass Molding for mild aspheric departures or mid-volume production.

Injection Molded

Ideal for volume production as a weight-sensitive, low cost alternative to glass aspheric lenses.

Glass Molded Aspherical Lenses
Item Code Material OD(mm) EFL(mm) WD(mm) CT(mm) NA Design Wavelength (mm) Laser Window (mm)
AL01140240 D-ZLAF52LA 2.40 1.14 1.129/4.826 1.239 0.43/0.124 1300 BK7, t=0.30
AL01140241 D-ZLaF52LA 2.40 1.14 0.720 1.24 0.55 1310 N/A
AL01400240 D-ZK3 2.40 1.45 0.88 1.00 0.560 780 N/A
AL02000300 D-ZK3 3.00 2.00 1.09 2.00 0.50 780 BK7, t=0.25
AL02750450 D-ZLaF52LA 4.50 2.75 1.50 2.24 0.64 830 N/A
AL03100630 D-ZK3 6.325 3.10 1.76 3.214 0.670 830 N/A
AL03200300 D-ZLaF52LA 3.00 3.20 2.09 2.00 0.37 633 N/A
AL03760300 D-ZK3 3.00 3.76 2.98 1.50 0.33 635 BK7, t=0.25
AL04000400 D-ZK3 4.00 4.00 2.91 2.00 0.40 405 BK7, t=0.25
AL04050630 D-ZK3 6.33 4.05 2.80 3.10 0.63 445 PC, t=1.20
AL04020631 D-LAK6 6.325 4.02 2.41 2.90 0.60 408 BK7, t=0.25
AL04470540 D-ZK3 5.42 4.47 3.08 3.45 0.47 780 PC, t=1.20
AL04500300 D-ZK3 3.00 4.50 3.46 1.78 0.30 633 BK7, t=0.25
AL05000300 D-ZK3 3.00 5.00 4.03 1.53 0.26 915 N/A
AL06000300 D-ZK3 3.00 6.00 5.20 1.50 0.21 635 BK7, t=0.25
AL06160470 D-ZK3 4.700 6.16 4.37 3.48 0.30 780 BK7, t=0.275
AL06240720 D-ZK3 7.20 6.24 3.43 5.36 0.40 780 BK7, t=0.275
AL06430630 D-ZK2N 6.35 6.43 4.70 3.11 0.43 830 BK7, t=0.25
AL08000450 L-BAL42 4.50 8.00 6.73 2.00 0.22 915 N/A
AL08000990 D-ZK3 9.936 8.00 5.90 3.43 0.50 780 BK7, t=0.25
AL08420800 D-ZK3 8.00 8.42 7.05 2.30 0.37 635 BK7, t=0.25
AL08800550 L-BAL42 5.50 8.80 7.35 2.40 0.26 635 N/A
AL08950650 L-BAL42 6.50 8.95 7.60 2.36 0.30 635 BK7, t=0.25
AL10000630 D-ZK2N 6.35 10.00 8.29 3.00 0.28 635 BK7, t=0.25
AL10990720 D-ZK3 7.20 10.99 7.90 5.032 0.28 633 BK7, t=0.25
AL11180800 D-ZK2N 8.00 11.18 9.69 2.66 0.31 635 BK7, t=0.25
AL11241500 D-ZK3 15.00 11.24 6.83 7.00 0.62 587 N/A
AL12060650 L-BAL42 6.50 12.06 10.61 2.36 0.22 635 BK7, t=0.25
AL13850630 D-ZK3 6.325 13.85 12.10 2.773 0.180 650 N/A
AL15290650 D-ZK3 6.50 15.29 13.89 2.209 0.16 780 N/A
AL15261050 L-BAL42 10.50 15.26 13.58 3.00 0.30 639 BK7, t=0.30
AL16701000 L-BAL42 10.00 16.70 14.65 3.225 0.265 976 N/A
AL18390650 D-ZK3 6.50 18.39 17.09 2.18 0.150 780 BK7, t=0.25
AL19001000 L-BAL42 10.00 19.00 17.00 3.14 0.23 915 N/A
AL22580800 D-ZK2N 8.00 22.58 21.25 2.35 0.15 532 BK7, t=0.25
AL24060950 D-ZK2 9.50 24.06 22.76 2.35 0.16 785 BK7, t=0.25
AL31990930 L-BSL7 9.3 31.99 30.73 2.3 0.122 785 BK7, t=0.30

Manufacturing and Equipment

Ultra-precision measurement aspheric molds

Ultra-precision measurement aspheric molds

Precision Aspheric Mold Suite

Precision Aspheric Mold Suite

Precision Aspheric Mold Subassembly

Precision Aspheric Mold Subassembly

Precision Aspheric Mold Inner Barrel

Precision Aspheric Mold Inner Barrel

Precision Aspheric Arrays

Precision Aspheric Arrays

Precision Aspheric Mold Kernels

Precision Aspheric Mold Kernels

Precision Aspheric Component Measuring Instruments

Precision Aspheric Component Measuring Instruments

Glass Aspheric Molds

Glass Aspheric Molds

Sellwell Aspheric Lens Coating

Coating Wavelength Range Reflectivity
MLBB-A 350 ~ 700nm Ravg < 0.50%
MLBB-B 600 ~ 1050nm Rmax < 1.0%
MLBB-C 1050 ~ 1600nm Rmax < 1.0%
MLBB-Q 1300 ~ 1700nm Rmax < 0.25%
UVA 350 ~ 600nm Rmax < 1.0%
BB400-700 400 ~ 700nm Ravg < 0.50%

Customized coating are available upon negotiating, Sellwell Optics offers a variety of multilayer broadband coatings to reduce the back reflection from a nominal 6% for uncoated lenses. The choice of which AR coating is appropriate depends on the type of glass the lens is made from and the wavelength at which the lens will be used.

For more than 30 years, Sellwell Optics has been building a reputation as one of the top optical glass manufacturers in optics industry. Sellwell Optics' dedication to innovation, quality control and fast customer service has enabled us to consistently exceed the expectations of our most valued and important audience, our customers.

Optical Design
We design optical systems to meet customer’s specifications from selecting glass materials to design of lens and lens units.
Precision die and preforms

We manufacture molding dies made of special alloys and ceramics which withstand high temperatures. Ultraprecision technical expertise is required to grind surfaces of metal dies to implement optical designs in a nano-order. Then, we prepare polished near-net shape preforms for

Aspheric Lens Manufacturing Procedure

Pressing

After setting preforms on a molding die, we press the preforms while heating at 300 to 700 degree Celsius until the preforms get soften. Then, anneal the pressed preforms, and aspheric shaped glasses are taken out of the molding die.

Coating

Lenses are coated upon request (e.g. anti-reflect coating).

Inspection

Lenses are inspected with the following measurement instruments.

A Part of machine & equipment Sellwell Manufacture Optics Aspheric Lenses

Instruments Made by Models Number Measurement contents
3-D Profilometer Panasonic UA3P-4 1 Surface form of aspheric lens
Panasonic UA3P-300 1 Surface form of aspheric lens
Panasonic UA3P-400T 1 Surface form of aspheric lens
Laser Interferometer FUJIFILM F601 2 Form measurement of spherical lenses
FUJIFILM FI251N 1 Form measurement of small spherical lenses
Optical centration measurement and alignment instrument Trioptics OptiCentric 3D 2 Centration, center thickness and air gap of optical systems
Trioptics OptiCentric MOT 1 Centration, center thickness and air gap of optical systems
3D Laser scanning microscope Keyence VK-X200 1 Non-contact dimensional measurement
Measuring microscope Mitutoyo MF 1 Dimensional measurement
Keyence IM-6700-6225 1 Dimensional measurement
Spectrophotometer Jasco V-700 1 Transmittance
MTF Test station Trioptics Image Master HR 1 MTF, relative illumination, chief ray angle, distortion

Meniscus Lens Specification

Material Optical glass/ Fused silica/ sapphire etc.
Diameter 2mm~300mm
Diameter tolerance ±0.05mm(≤50mm)
±0.1mm(＞50mm)
Focal length -50mm~-2000mm
Focal length tolerance ±0.2%（＜10mm）
±0.5%（＜10mm-1000mm）
±1%（＜＞1000mm）
Center Thickness 2mm~20mm
Surface quality 60/40， 40/20， 20/10
Surface accuracy λ/2~λ/10@632.8nm，532nm
Clear Aperture >85% dig diameter
Centration <3arc min~ 30arc sec
Coating As per customer’s request

Meniscus Lens List

Material Diameter
(mm)		 Convex Surface Radius
(mm)		 Concave
Surface Radius
(mm)		 Center Thickness
(mm)		 Focal Length
(mm)
H-K9L 7 4.6 -4.60 3 41.4
H-LAF38 8 6.28 -95.10 2.2 8.9
H-ZBAF5 8 9.7 -19.72 2.27 26
H-ZF52A 8 12.05 -9.50 4.2 217
ZnSe 8.6 11.22 -50.58 1.4 8.7
H-ZF62 9 9.911 -38.55 2.1 13.8
H-ZF62 9 10.59 -13.37 7.64 23.8
H-K9L 10 5.19 -500.00 6.2 10.1
JGS1 10.802 7.69 -7.28 3 226.1
H-K9L 11 16.57 -156.37 3 35.5
H-LAF50A 12 13.176 -132.74 3.3 18.7
H-ZK9 12 11.57 -48.93 2.86 23.7
H-ZBAF21 12 15.374 -65.11 3 27
H-ZK3 13 8.088 -21.23 4 23.2
S-LAM7 13 16.94393 -170.00 2.5 24.9
H-ZLAF75A 14 13.804 -51.24 2.4 20.1
H-ZF7LA 14 11.324 -5.50 9.54 49.3
H-K9L 14 10.36 -14.62 5 50.3
H-ZLAF68 14 10.16 -6.87 6.4 282.2
H-ZF6 15 119 -18.95 3.86 30.3
H-LAF3B 15 20.73 -145.88 2.8 32.2
H-K9L 15 9.26 -18.16 3.5 32.3
H-ZLAF55A 15 28.847 -293.95 3 38.1
H-ZK3 15.2 15.3 -231.90 2.8 27.67
LAF10 15.5 24.66 -163.59 2.7 36.52
H-LAF53 16 12.823 -33.57 4.8 25.4
H-ZLAF52 16 18.67 -67.51 3 31.2
H-ZK6 16 13.996 -34.67 3.5 36.4
H-LAK4 16 22.7 -39.63 4 74.8
H-ZLAF68 16 11.251 -7.74 4.8 78.1
ZK9 17 11.695 -11.70 7 81.4
H-ZF13 18 96.302 -26.99 1.5 48.2
H-K9L 18 36.4 -51.52 3.5 222.45
H-LAF10L 18.98 21.38 -32.36 3.6 69.8
H-ZK9A 19 13.895 -29.05 3.6 39.4
ZK7 19.4 17.783 -43.05 3 47.29
H-LAF53 20 16.482 -55.46 4 30.1
H-ZK10 20 18.054 -35.41 5 53.3
H-ZLAF66 20 21.099 -28.09 5 80.3
H-ZK7 20 60.67 -778.00 2.9 106.8
H-BAK4 22 17.497 -114.52 4.7 36.7
H-LAK3 22 21.04 -39.81 3.8 54.7
H-ZBAF3 22 38.9 -498.90 2.7 63.8
H-K9L 22 72.44 -1130.00 5 149.5
H-BAK4 22.5 24.619 -1735.00 5 45
H-ZF7LA 22.6 22.44 -28.91 9.88 74
H-LAF53 23 16.788 -36.22 5 38
H-LAF53 23 16.788 -36.22 5 38
BAF5 23 32.8 -219.10 3 62.3
H-ZK1 23.4 46.48 -176.06 4.56 109.6
H-LAK59 23.48 102.33 -194.98 2.5 308.2
H-ZF7LA 24 17.819 -30.30 10 39.6
H-K9L 25 17.3 -27.00 4.55 80.3
H-K9L 25.4 32.1 -82.20 3.6 100
JGS1 25.4 31 -91.20 4 100
H-K9L 25.4 66.2 -182.20 2.8 200
JGS1 25.4 64.2 -209.80 2.9 200
H-K9L 25.4 100.9 -288.20 2.5 300
ZK9 25.5 22.96 -89.26 4.4 48.59
N-SF6 26 32.15 -176.40 4 43.2
H-LAK3 26 26.79 -127.94 4.2 44.4
H-K9L 26 23.93 -331.70 6 49.58
H-ZK11 27 23.07 -77.04 4.8 49.8
H-LAK1 27 26.24 -74.99 4.1 59.8
H-ZK10 27 38.688 -1541.90 5 63.7
H-ZK10 27 43.279 -311.79 5 80
H-ZK9 28 21.82 -83.35 5.5 46.07
H-ZBAF21 28 37.865 -862.87 3.5 54.7
H-LAF53 30 18.75 -52.24 7.5 35.9
H-K9L 30 18.8 -37.95 5.9 65.7
ZK9 32 23.99 -42.85 8 75.58
H-BAK4 33 23.4 -38.20 6.2 95.14
H-K9L 33 50.35 -85.11 3.1 231.74
H-ZF6 33.5 213.8 -46.03 2.97 71.9
H-ZK98 34 49 -75.00 4.5 213.7
H-ZBAF3 35 38.15 -212.35 10 69.2
H-K9L 36 64.9 -116.41 3.6 277.48
H-ZBAF3 40 52.2 -2148.00 12.1 81.3
H-K9L 40 45.71 -62.37 3.5 309.27
H-K9L 41 78.52 -622.30 4.1 173.57
H-K9L 41 65.77 -111.94 3.7 300.61
F2 42 28.5 -71.30 8.8 71.8
H-ZBAF20 42 32.137 -59.02 14 82.8
H-QK3L 42 35.471 -34.95 14.1 621
H-ZF6 43.2 51.2 -71.28 4 221.7
H-QK3L 44 37.026 -239.30 8 88.7
H-ZF6 45 48.91 -87.90 5 136.7
H-K9L 48.5 72.44 -150.31 4.5 265.57
H-ZK11 49 32.81 -104.23 11.4 70.6
H-K9L 50.5 81.75 -145.88 4 352.64
H-K9L 58 107.15 -477.00 7 265.1
F4 59 1267.1 -266.16 5 544
H-K9L 60 39.72 -142.41 13.8 102
H-K9L 60.274 66.37 -178.49 10.66 198
H-K9L 60.274 122.987 -424.51 10.66 331
H-ZF2 74 65.851 -121.34 9 201
H-ZBAF21 76 157.04 -306.97 6 437
H-K9L 81 203.7 -2773.00 9.96 424.84
H-LAK7 104 181.59 -320.37 12 567.4
H-K9L 106 110.1 -257.80 11.3 362.4

Sellwell Optics's high precision glass molding technologies is able to enable mass volume production of aspheric lenses with maintaining the ultra-precised quality at an resonable price comparing to others. Because glass molding is the most consistent and economical manufacturing method to produce aspherical lens in large volume, Sellwell Optics has completely perfected this method to offer the most precise aspheric lens available. Sellwell Optics offers standard and custom-made aspheric lenses, all designed by our professional optical design engineers.

Sellwell Optics aspheric lens manufacturing supports a wide range of optical glass, lens designers are freedom to select the glass that is best suited to the their applications.

Using Sellwell Optics's aspheric lens benefit from the quality and performance of all-glass aspherical lenses

Please contact us via sales (at) sellwellgroup.com, sales (at) aspherics.com

Aspheric Lens, Aspherical Lenses, Aspheres - Sellwell Optics Manufacturing Ltd.

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