Shortwave infrared lenses offers unique imaging advantages over visible and other thermal bands. SWIR lenses are sensitive for finite detail recognition.

E-Mountian bike:You can ride more, adding our ultra-slim light bar to your electric mountain bike as a headlight. New lithium battery technology on electric bikes will allow you to use high output LED headlight for hours without affecting the range performance. You can wire our 10" ultra-slim light bar directly to your headlight output if you have motors with 12v 2a output such as Shimano E5000, E7000, E6100, E6110, and EP8. Or wire it to your battery directly. With 3500 lumens, this is the brightest LED headlight for e-bikes!

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Marine:IP68 waterproof seal makes it perfect for marine applications. Use it for docking lights or deck lights, even interior lights for your engine compartment where bright led lights are needed.

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If there is a special combination from magnification, wavelength and maximum input beam diameter not existent in the catalogue you can request it nevertheless.

A tunable magnification is the main advantage of zoom beam expanders. A manual or motorized variable adjustment enables a 1 to 3 times or respectively a 1  to 8 times variation of the magnification. For that zoom beam expanders are more flexible than normal ones. A disadvantage is a lower beam quality. Furthermore most of the zoom beam expanders have a short-term internal beam reduction. This can result in high power or rather energy densities on top of the lens elements. Because of that reasons it is only recommended to use zoom beam expanders if it is really necessary. The suitability for high power and short pulsed lasers should be cleared up before.

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Furthermore for a horizontal setup it is better to fix the long zoom beam expanders with a central clamping ring instead of using the lateral C-Mount. For more details we are looking forward to supporting you.

On the other hand there is the Galilei setup which consists of a dispersing and a collecting lens group. The group at the front side makes the beam divergent while the group behind collimates so that the input and the output beam are both parallel to the optical axis.

This physical correlation shall apply for beam expanders with a fixed magnification as well as for zoom beam expanders with a variable magnification.

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Every beam expander from Sill Optics has a mechanical or electrical divergence adjustment available. This enables a compensation of the inherent laser divergence and an optimal collimation. Furthermore the beam can be focused (convergent beam path), defocused (divergent beam path) systematically.

Motorcycle & ATV:Small size, low power consumption makes it perfect for small battery applications like motorcycles, ATV's and UTV's. It can be mounted on handlebars or fairings. 10 inch LED lightbar only uses 25 watts producing three to four times more light than a standard motorcycle headlight.

Ultra-Thin, Compact size for various applications: Offroad, ATV, UTV, Trucks, Motorcycles, Travel Trailers, Motorhomes, Boats, Electric Mountain Bike headlights. It can be mounted almost anywhere, behind the grille, fender, wheel well, front and rear bumper with included mini light bar brackets.It can be wired as offroad lights, reverse lights, step board lights, rock lights.

Agriculture:Are you working at night? High output LEDs will light up the field! Install multiple ultra slim LED light bars around your cab for a 360-degree view.

The scale for the divergence adjustment of Sill lenses specifies the lens distance change [mm]. Normally it can be variated in a region of ± 3 mm. In case of custom specific special lenses the adjustmant range can even exceed 3 mm.

There is a new series for UV applications with a colorless anodized housing which is equivalent to standard beam expanders with a fixed magnification. The code "S6EXN" (instead of "S6EXP") means that this is a product with a colorless anodized tube.

Offroad: Great for offroad applications to light up the trail at night as your main offroad lights. Amber versions are great for cutting through dust and fog. They can be used as rock crawling light bars or even reverse light bars for your truck.

Usually beam expanders are used to increase the diameter of laser beams.  Stating that the product of beam diameter and divergence is constant for one wavelength, the divergence decreases with increasing beam diameter by the same factor.

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Sill Optics offers two adjustable mounts (S5SET0125 and S5SET0150) with these adjustment possibilities as an accessories.

The Galilei principle enables beam expanders with short overall lengths. In contrast to the Kepler structure there is no internal focus point, which can result in a critical rise of temperature inside the lens if the distance to the neighbored lenses is too small. Therefor this type is suitable for short pulsed lasers. Because of these crucial advantages over the Kepler principle the Galilei principle is often the first choice.

RV: Great for lighting up your camp spot, safely backing up your motorhome or travel trailer at night, or just security led lights for your RV.

The zoom beam expanders from Sill Optics also have a separate divergence adjustment which can be variated independent of the magnification.

Sill Optics offers different series of beam expanders. The portfolio includes a compact series with a maximum magnification of 4x and zoom beam expanders with a variable magnification for a specified region. Furthermore there are motorized beam expanders with an electrical divergence and/ or zoom control and versions for lasers with wavelengths between 266 nm and 1,980 nm. The beam expanders include fused silica lenses with a low-absorption coating to avoid excessive heat. So our beam expanders are able to withstand high strain even with small beam diameters and they are suitable for short pulse lasers.

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Ultra-Bright!Highest generated lumens per watt: With 140 Lumens per watt, our 10-inch ultra slim led light bar will generate a whopping 3500lumens with only 2amps on 12v applications (M-Series, 10-inch ultra-slim led lightbar rated at 25 watts). Most regular halogen car headlight bulbs put out 700 lumens on low beam and 1200 lumens on high beam for comparison, making our 10" ultra-slim led light bar almost three times brighter than a regular car headlight on high beams!

The divergence adjustment is very sensible for a high magnification. Reversely, standard divergence adjustments in combination with small magnifications do not suffice in some cases.

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OZ Ultra slim LED light bars are the brightest light bar of their size in the market. Ultra-thin compact size led light bars can be installed in many locations on your vehicle. Low profile, slim design will fit in openings as small as 1.25". The highest lumen rating per watt makes this light bar the brightest in the market of its size. Available with amber LEDs, white LEDs, or color-changing both. IP68 marine-grade waterproof sealed. Ultra-slim single row light bar sizes available in 10", 20", and 30".

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Ultra-ToughDon't make small light bar size fool you. This super slim led light bar is as tough as its big brothers. IP68 sealed, Waterproof, Dustproof, Shockproof, and Frostproof! This light bar is designed for heavy outdoor use, and it will withstand extreme weather conditions. A waterproof breather will regulate the air pressure inside the lightbar, keeping circuit boards at optimum performance for the electronics' increased lifespan. LED Chips are rated for 50,000 hours of operation.

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A decreasing distance between the first and second lens group makes the output beam more divergent (see middle of the figure). On the other hand an increasing distance makes the beam more convergent (see lower part of the figure).

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Industrial:It is an excellent led light bar for industrial applications or construction vehicles. Compact size will allow you to add multiple lights in various locations to light up the construction site or the warehouse.

On the one hand there is the Kepler principle which consists of two focusing lens groups. The first one focusses the beam. The second lens group is positioned behind the common focus point and collimates the divergent light again.

Beam expanders are optical systems for increasing or decreasing the diameter of a laser beam. A beam expander can enlarge an input beam by the factor M, but it can also reduce it by the factor 1/M with a reversed optical beam path.

Depending on your wishes an electrical adjustment of the divergence or the magnification or both by a computer is possible. Instructions and manuals are available on request.

Especially for zoom beam expanders the positioning inside the whole optical setup has an important role to play. A tilt between the optical axis and the expander can result in a high pointing default. Pointing means the lateral aberration of the laser beam or the change of direction after the beam expander depending on the zoom adjustment. Exact positioning or alternatively a setup which is able to compensate such position variations is necessary for an optimal light ray path through the whole setup.