Selecting the right laser diode collimating lens is essential for achieving a tight, stable beam in DIY projects, labs, and professional setups. This guide reviews five notable options, highlighting materials, wavelengths, and compatibility to help you compare performance and make informed choices for your optics work.
Summary of featured products
| Product | Brand | Wavelength Range | Key Use | Notes |
|---|---|---|---|---|
| Acxico 1Pcs 405nm-488nm | Acxico | 405–488 nm | Industrial test, Lab, DIY | 3-element glass lens; high permeability |
| Acxico 1 pcs G-2 405nm/445nm/515nm | Acxico | 405, 445, 515 nm | Colimation/focusing for diode modules | Glass collimating lens with holder |
| Glass Collimating Lens Holder (Lights88) | lights88 | 405–660 nm | General collimation for violet/blue/green | Brass tube, 1 pc |
| Qiaoba 445nm G-2 Lens | Qiaoba | 400–700 nm | DIY laser diodes, multiple wavelengths | Glass lens with holder |
| NYBG 5mm Laser Diodes Collimating Lens | NYBG | Visible range | All kinds of laser diodes | Diameter 5mm, 8.0mm focal length |
Acxico 1Pcs 405nm-488nm Blue Laser Diode Collimation
The Acxico 1Pcs 405nm-488nm Blue Laser Diode Collimation Focus Lens features a three-element glass lens designed for improved light transmission and beam quality. It is labeled as a high-permeability optical component suitable for industrial testing, lab applications, and DIY experiments. It requires proper eye protection and operator experience in optics to ensure safe and effective use.
Acxico 1 pcs G-2 405nm/445nm/515nm Laser Lens
This G-2 laser lens from Acxico is designed for diode laser modules, serving as both a collimating and focusing element. It is intended to work with a range of diode wavelengths, including 405 nm, 445 nm, and 515 nm. The package includes a laser lens folding/holding setup, enabling straightforward integration into existing diode assemblies and collimators.
Glass Collimating Lens Holder for 405-532nm
Lights88 offers a glass collimating lens with a brass tube, designed for the 405–660 nm spectrum. The lens is specified for wavelengths around 405–450 nm and features a black metal frame with M9x0.5 mm threading. This option emphasizes durability and stable mounting for violet-to-blue-green laser diodes in compact configurations.
Qiaoba 445nm G-2 Collimation Lens
The Qiaoba 445nm G-2 laser lens is a glass collimating lens with a focusing capability, compatible with 400–700 nm wavelengths. It is suitable as a DIY laser diode collimator lens holder for multiple diode wavelengths including 445 nm, 450 nm, 532 nm, and other common diode lines. The included holder aids in secure, repeatable alignment.
NYBG 10pcs 5mm Collimating/Focusing Lens
This NYBG set includes 10 pieces of 5mm diameter collimating lenses, with a focal length of 8.0mm. They are designed for use as either collimating or focusing lenses across a range of laser diodes, offering a cost-effective option for bulk projects and experimentation with 5 mm diode modules.
Lilly Electronics 3pcs TO-18 Laser Diode Housing
These Lilly Electronics lens housings are designed for TO-18 laser diodes, with inner diameter around 10.3 mm and outer dimensions of 12 x 40 mm. The silver metal body provides a rugged mount for precision alignment, while the integrated collimating lens supports stable beam output for various diode configurations.
Buying Guide
Key considerations when choosing a laser diode collimating lens include wavelength compatibility, focal length, and mount compatibility. For color-specific projects (blue, violet, green), ensure the lens material and coatings maximize transmission in the target range and minimize reflection losses. A longer focal length can improve beam collimation at greater distances but may require precise mounting geometry. Material choices—glass versus PMMA—impact durability, thermal resistance, and optical clarity. Assess whether a dedicated lens holder or integrated housing simplifies alignment and repeatability in your setup. Finally, consider the scale of your project: bulk packs offer cost savings for lab or classroom environments, while individual lenses are common in compact DIY builds.
- Wavelength coverage: Match the diode wavelength to the lens coating and material.
- Focal length: Balance beam quality with available space in the optical path.
- Mounting and compatibility: Ensure thread size, housing, and diameter fit your module.
- Durability: Glass lenses offer clarity and resistance, while PMMA variants may be lighter and cheaper.
- Safety: Always use eye protection and verify alignment with appropriate power limits.
For researchers and hobbyists, selecting a standardized 5 mm or TO-18 housing lens often yields the best interoperability across vendors. When comparing options, evaluate both the stated wavelength range and the practical transmission performance under your specific diode current and housing configuration. The listed products provide a spectrum of approaches—from complete lens assemblies with holders to standalone glass lenses—allowing you to optimize for beam quality, mechanical stability, and project scale.