If your BM110 head is producing a wider kerf than usual, losing power on thicker material, or the cut edge quality has quietly gotten worse over a few weeks, the collimating lens is often the real cause - not the focusing lens people usually suspect first. This is the genuine Raytools BM110 collimating lens, 100 mm focal length, the optic that takes the diverging beam coming out of the fiber and turns it into a parallel beam before it reaches the focusing lens. It's currently in stock and dispatches within 1-3 business days from our Ahmedabad warehouse, with delivery across India.
Every fiber laser head has two main optics working together: the collimating lens near the input, and the focusing lens near the nozzle. The collimating lens's job is to shape the beam into a tight, parallel column - if that shaping is off, the focusing lens further down the line can never produce a clean, small focal spot no matter how well it's aligned. On the BM110, this is the 100 mm focal length version, made from fused silica with anti-reflective coating on both faces for high-power fiber laser wavelengths. Because this lens sits directly in the beam path at close to full power, it's also one of the components most exposed to thermal stress over time - which is why replacing it with a genuine, properly coated lens matters more here than almost anywhere else in the head.
Specifications
Specification
Detail
Focal length
100 mm
Material
Fused silica (quartz)
Coating
AR-coated both faces, tuned for 1064-1080 nm
Function
Collimates diverging fiber output into a parallel beam
Position in head
Beam input side, before the focusing lens
Head compatibility
Raytools BM110
Stock status
In stock, ships in 1-3 business days
Why the Collimating Lens Matters More Than It Looks
A lot of cut-quality troubleshooting starts and ends at the focusing lens, but the collimating lens sets up everything downstream of it. If the beam isn't collimated properly, the focusing lens receives a beam that's already slightly out of shape, and no amount of focus adjustment fully corrects for that. On the BM110, the 100 mm collimating lens is matched to the head's optical path length - swapping in a mismatched focal length, or running on a lens with degraded coating, typically shows up as a larger-than-normal kerf, reduced piercing speed, or edges that look "rougher" than the machine's rated capability, even when every other setting checks out.
Signs You Need to Replace It
Kerf width noticeably wider than it used to be
Cut quality drops on thicker material even with correct parameters
Piercing takes longer or fails more often
Visible haze, burn spot, or coating discoloration on the lens
Effective cutting power seems lower than the rated output
Focus adjustments no longer restore the previous cut quality
Features & Benefits
Features
Genuine Raytools BM110 collimating lens, 100 mm focal length, fused-silica substrate, dual-side AR coating for high-power fiber laser use, matched to the BM110's optical path.
Benefits
Restores tight beam collimation for a cleaner focal spot, improves cut edge quality and piercing reliability, protects downstream optics from compensating for a bad beam shape, and avoids the guesswork of chasing cut-quality issues that trace back to this lens.
Genuine Raytools Lens vs Generic Lens
Parameter
Genuine Raytools (this product)
Generic / Unbranded
Substrate
High-purity fused silica
Mixed-grade, often undocumented
AR coating
Tuned for 1064-1080 nm, both faces
Inconsistent, sometimes single-face only
Focal length accuracy
Exact 100 mm, matched to BM110 path
Tolerance drift affects focus spot
Thermal stability
Rated for continuous high-power use
Prone to thermal lensing over time
Fitment
Exact BM110 housing fit
Tolerance mismatches common
Why Order From Spareszone
Genuine Raytools optics - not relabeled or mixed-source glass
In stock right now - dispatched in 1-3 business days
GST-registered supplier (GSTIN 24AFSFS3212F1Z2) with proper invoicing
Ahmedabad-based warehouse with pan-India courier reach
WhatsApp support to confirm head model and fitment before you order
Bulk pricing for job-work shops and fabrication units
Frequently Asked Questions
It takes the diverging beam coming out of the fiber and shapes it into a parallel beam before it reaches the focusing lens, which directly affects focal spot size and cut quality.
The 100 mm focal length is matched to the BM110's optical path length. Using a different focal length lens changes the beam shape reaching the focusing lens and affects cut performance.
The collimating lens sits at the beam input side and shapes the raw beam into a parallel column. The focusing lens sits near the nozzle and converges that beam to a focal point on the material. Both need to work correctly together for a clean cut.
Common signs are a wider kerf than normal, reduced effective power, slower or failed piercing, and cut quality that focus adjustments no longer fix.
Yes, this is a genuine Raytools BM110 collimating lens, not a generic replacement.
It's in stock and dispatches within 1-3 business days, with courier delivery across India.
Yes, every order ships with a proper GST invoice for your records.
Yes, bulk pricing is available - message us on WhatsApp with your quantity for the best rate.
In stock, dispatched in 1-3 business days, with GST invoice and pan-India delivery. Message us on WhatsApp if you'd like your head model confirmed before ordering, or request a quote for bulk quantities.
