Bi-convex (double-convex) lens

Material

K9, quartz, fused silica, BK7, Sapphire, CaF2, Zns and other crystal materials

Design Wavelength

632.8nm

Focal Length Tolerance

±1%

Diameter Tolerance

+0.00/-0.10mm

Thickness Tolerance

±0.1mm

Surface Accuracy

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Surface quality

60/40

Centration

<3arc min

Clear Aperture

>90%

Bevelling

<0.2X45°

Coating

A: BBAR Ravg < 1% From 400nm-700nm; B: BBAR Ravg < 1% From 700nm-1100nm

bi-convex lens instruction

biconvex lens 1

A biconvex lens will focus light into a single point with a positive focal length and consists of two convex surfaces of equal radius. It is commonly used for imaging relay systems and for imaging objects at finite conjugate distances. When the conjugate ratio is larger, the resulting aberration is larger.

bi-convex lens applications

A biconvex lens has a positive focal length and can also focus parallel beams. Since the front and rear surfaces of biconvex lenses are convex spheres with equal radii of curvature, biconvex lenses can significantly reduce spherical aberration and improve coma and aberrations in applications where the object distances are equal or approximately equal. When the conjugate ratio is between 5:1 and 1:5, the aberration introduced by the biconvex lens is minimal.

bi-convex Lens Standards

Item No.EFL(mm)Dia(mm) R1=-R2(mm) BFL(mm) Tc(mm) Te(mm)
GST061010.006.009.889.172.401.50
GST061212.006.0011.9611.222.301.50
GST061515.006.0015.0914.292.101.50
GST063030.006.0030.6029.401.801.50
GST091212.009.0011.7210.753.601.80
GST092020.009.0020.1219.052.801.80
GST121515.0012.7014.6113.364.701.80
GST122020.0012.7019.9218.673.901.80
GST122525.0012.7025.1623.853.401.80
GST123030.0012.7030.3728.963.101.80
GST124040.0012.7040.7339.072.801.80
GST125050.0012.7051.0649.132.601.80
GST12100100.0012.70102.6499.272.201.90
GST252525.4025.4024.5322.239.002.00
GST253030.0025.4029.5427.347.702.20
GST253535.0025.4034.8632.686.802.00
GST254040.0025.4040.1437.936.102.00
GST255050.0025.4050.6148.255.202.00
GST256060.0025.4061.0058.434.702.00
GST257575.0025.4076.5673.634.102.00
GST25100100.0025.40102.4098.813.602.00
GST25125125.0025.40128.21123.913.302.00
GST25150150.0025.40154.00148.973.102.00
GST25175175.0025.40179.79174.042.902.00
GST25200200.0025.40205.56199.072.802.00
GST25250250.0025.40257.10249.142.602.00
GST25300300.0025.40308.63299.172.502.00
GST25400400.0025.40411.66399.212.402.00
GST25500500.0025.40514.70499.242.302.00
GST25750750.0025.40772.26749.272.202.00
GST2510001000.0025.401029.81999.272.202.00
GST506060.0050.8059.2655.0414.403.00
GST507575.00050.8075.2071.0011.803.00
GST50100100.00050.80101.3896.819.503.00
GST50125125.00050.80127.38122.308.103.00

Why Choose Our Bi-convex Lenses

why plano convex lens

1. Wide range of material processing capabilities
Optical glass from Corning, Schott, Heraeus, Ohara, Tosoh, Hoya, CDGM, and others                                       
2. Stock optical components offered
Wide range of optical lenses, prisms, filters, and other optical components
3. Extensive optics production facilities
CNC polishing, precision-molded, free form optics
4. ISO 9001 certification
We have passed ISO 9001: 2015 certification.   
5. Standard and custom coatings
0.11 Enhanced coating technology, TOF sputtering coating process, ultra-low reflection coating, BG+Suspension Coating

benefits2

ISO 9001:2015

benefits3

Quick response

benefits1

Fast delivery

benefits12

Design on demand

benefits4

All good reviews

benefits10

Reasonable price

benefits8

Insepection 100%

benefits5

Clients from 30+ countries

benefits 13

Long-term business

why us 4

Low MOQ

benefits 15

Sample free on stock

why us 9

After-sale service

Our awesome clients

More customers already trust us
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bi-convex purchasing guides

Things you must know before you make a decision to purchase your bi-convex lenses.
Do you offer free samples for testing?

Yes. We can provide free samples for testing on two conditions: 1. The cost of the sample is not too high. 2. The quantity is not more than 3 pieces.
Sometimes we charge the sample fee up front, but when the customer places an order this fee is deducted. This is still equivalent to giving the customer free samples.

How do you ensure your product quality?

The optical lenses used in each project are made by a small team. Each worker is responsible for his grinding, polishing, chamfering, coating, etc. Everyone has a smooth handover and do not hand over defective products to the next process. An interferometer is placed in the workshop to quickly check the quality of the product on site.

How can you ensure your lead time ?

We plan precisely to ensure that each shipment is delivered on time. Even if we cannot deliver on time due to force majeure, we will inform our customers in advance.

How do you handle a customer complaint?

If it is our responsibility, we will cover 100% of all costs. If the customer is also responsible, we will also do our best to help come up with a solution.

If the optical lenses are damaged in delivery, how do you fix it?

First of all, the probability of such a thing happening is extremely low. If unfortunately it happens, then sorry, we will send you the brand new optical lenses free of charge.

Can you do door-to-door service?

Door-to-door service is available for all the products we make, except optical lenses. Just tell us what you need and we give you a one-stop service.

send your inquiry today