>>Product Description
Fresnel Lenses are used in many light collection applications, such as condenser systems or emitter/detector setups.Fresnel Lenses are optical lenses consisting of a series of concentric grooves etched into a plastic substrate.Each groove acts as an individual refracting surface, while the thin substrate minimizes the amount of light lost due to absorption.High groove density increases image quality, while low groove density increases the overall efficiency.Fresnel Lenses are typically not used as magnifier or projection lenses due to high levels of distortion.
VY Optics could manufacture kinds of optical fresnel lenses,dimension is customized.
| Groove Density (grooves/inch) |
125 |
| Dimensions (inches) |
2.3 X 2.3 |
| Effective Diameter (inches) |
2.0 |
| Effective Focal Length EFL (inches) |
1.50 |
| Effective Focal Length EFL (mm) |
38.1 |
| Center Thickness CT (inches) |
0.06 |
| Dimensional Tolerance (inches) |
±0.05 |
| Thickness Tolerance (%) |
±40 |
| Transmission (%) |
92 (from 400-1100 nm) |
| Index of Refraction ND |
1.49 |
| Operating Temperature (°C) |
80 (Maximum) |
| Coating |
Uncoated |
| Substrate |
Acrylic |
| Wavelength Range (μm) |
0.4 - 1.1 |
| Type |
Fresnel Lens |
|
|
| Range of diameter |
Dia.0.7mm-Dia.400mm |
| Range of curve radius |
R1.5-R∞ etc. |
| Tolerance of diameter |
+/-0.1, +/-0.01, +/-0.005 etc. |
| Surface accuracy |
Λ , 1/2λ , 1/4λ , 1/10λ etc. |
| Tolerance of Thickness |
+/-0.1, +/-0.05, +/-0.01 etc. |
| Centration |
+/-2′, +/-1′ etc. |
| Aperture N |
5, 1 etc. |
| Irregularity ΔN |
2, 1, 0.5, 0.2 etc. |
| Surface quality |
60/40, 40/20, 20/10, 10/5 etc. |
>> Company Introduction
>>Related Products
VY Optics could also manufacture and design other optical elements, including achromatic lens, dome lens, filter, prism, ball lens, cylindrical lens, optical mirrors, spherical lens and rod lens, we can fabricate high-precision lens as per your requested.
>>FAQ
Q: Do you provide samples? Is it free or charged?
· We'd like to supply samples for free if we have it in stock, but we don't pay freight.
Q: How long is your delivery time?
· Regarding inventory, it is 3 working days;
· For customized one, it's about 15-25 working days, depended on exact quantity and order date.
Q: Is it possible to customize special lens?
· Yes, to customize special optical element and coating are available here.
Q: How to pay?
· T/T, Ali online assurance payment, MoneyGram, West Union, Paypal and so on.
Q: How to ensure the safety of payment?
· VY Optics is a reliable supplier not only audited on Ali, but also on Made-in-China, reputation and quality is life of our company, and we support Ali Trade Assurance.
Q: How do you ship goods?
· Low value sample: EUB, E Express of China Post, which is cheap;
· Light weight parcel: DHL, FedEx, TNT, UPS, EMS, SF Express, China Post;
· Heavy cargo: by air or by sea, ship on pallet.
Our company enjoy a considerable discount owing to long-term cooperation with courier company.
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