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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 | |
| 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
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.
- Industrial vision lenses
- Biomedical
- Industrial applications
- Semiconductors
- lighting
bi-convex Lens Standards
| Item No. | EFL(mm) | Dia(mm) | R1=-R2(mm) | BFL(mm) | Tc(mm) | Te(mm) |
|---|---|---|---|---|---|---|
| GST0610 | 10.00 | 6.00 | 9.88 | 9.17 | 2.40 | 1.50 |
| GST0612 | 12.00 | 6.00 | 11.96 | 11.22 | 2.30 | 1.50 |
| GST0615 | 15.00 | 6.00 | 15.09 | 14.29 | 2.10 | 1.50 |
| GST0630 | 30.00 | 6.00 | 30.60 | 29.40 | 1.80 | 1.50 |
| GST0912 | 12.00 | 9.00 | 11.72 | 10.75 | 3.60 | 1.80 |
| GST0920 | 20.00 | 9.00 | 20.12 | 19.05 | 2.80 | 1.80 |
| GST1215 | 15.00 | 12.70 | 14.61 | 13.36 | 4.70 | 1.80 |
| GST1220 | 20.00 | 12.70 | 19.92 | 18.67 | 3.90 | 1.80 |
| GST1225 | 25.00 | 12.70 | 25.16 | 23.85 | 3.40 | 1.80 |
| GST1230 | 30.00 | 12.70 | 30.37 | 28.96 | 3.10 | 1.80 |
| GST1240 | 40.00 | 12.70 | 40.73 | 39.07 | 2.80 | 1.80 |
| GST1250 | 50.00 | 12.70 | 51.06 | 49.13 | 2.60 | 1.80 |
| GST12100 | 100.00 | 12.70 | 102.64 | 99.27 | 2.20 | 1.90 |
| GST2525 | 25.40 | 25.40 | 24.53 | 22.23 | 9.00 | 2.00 |
| GST2530 | 30.00 | 25.40 | 29.54 | 27.34 | 7.70 | 2.20 |
| GST2535 | 35.00 | 25.40 | 34.86 | 32.68 | 6.80 | 2.00 |
| GST2540 | 40.00 | 25.40 | 40.14 | 37.93 | 6.10 | 2.00 |
| GST2550 | 50.00 | 25.40 | 50.61 | 48.25 | 5.20 | 2.00 |
| GST2560 | 60.00 | 25.40 | 61.00 | 58.43 | 4.70 | 2.00 |
| GST2575 | 75.00 | 25.40 | 76.56 | 73.63 | 4.10 | 2.00 |
| GST25100 | 100.00 | 25.40 | 102.40 | 98.81 | 3.60 | 2.00 |
| GST25125 | 125.00 | 25.40 | 128.21 | 123.91 | 3.30 | 2.00 |
| GST25150 | 150.00 | 25.40 | 154.00 | 148.97 | 3.10 | 2.00 |
| GST25175 | 175.00 | 25.40 | 179.79 | 174.04 | 2.90 | 2.00 |
| GST25200 | 200.00 | 25.40 | 205.56 | 199.07 | 2.80 | 2.00 |
| GST25250 | 250.00 | 25.40 | 257.10 | 249.14 | 2.60 | 2.00 |
| GST25300 | 300.00 | 25.40 | 308.63 | 299.17 | 2.50 | 2.00 |
| GST25400 | 400.00 | 25.40 | 411.66 | 399.21 | 2.40 | 2.00 |
| GST25500 | 500.00 | 25.40 | 514.70 | 499.24 | 2.30 | 2.00 |
| GST25750 | 750.00 | 25.40 | 772.26 | 749.27 | 2.20 | 2.00 |
| GST251000 | 1000.00 | 25.40 | 1029.81 | 999.27 | 2.20 | 2.00 |
| GST5060 | 60.00 | 50.80 | 59.26 | 55.04 | 14.40 | 3.00 |
| GST5075 | 75.000 | 50.80 | 75.20 | 71.00 | 11.80 | 3.00 |
| GST50100 | 100.000 | 50.80 | 101.38 | 96.81 | 9.50 | 3.00 |
| GST50125 | 125.000 | 50.80 | 127.38 | 122.30 | 8.10 | 3.00 |
Why Choose Our Bi-convex Lenses
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
ISO 9001:2015
Quick response
Fast delivery
Design on demand
All good reviews
Reasonable price
Insepection 100%
Clients from 30+ countries
Long-term business
Low MOQ
Sample free on stock
After-sale service
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.
