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Home > Optical Instruments > ELS-250
White Light Source

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Features
- 10,000 hours of long lamp life *1
- Superior CRI of Ra=94
- High brightness >650,000lx *2
- Perfect continual spectrum over the VIS 400nm to 750nm
- Cool illumination, less IR radiation
*1 Defined as time to 50% of original brightness
*2 Actual values measured 100mm from end of the collimating lens
via hibrid light guide (active core 10mm dia.) Those values are
typical output and actual output may vary.
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The ELS-250, fiber optic illuminator, is ideal as a heat free perfect white light souce for many applications like;
- Machine Vision
- Surface Inspection
- General Microscopy
- Fluorescence Microscopy
- Other technical lighting application
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The ELS-250 is based on the electrode-less technology driven by a solid state RF (radio frequency) apmlifier to eliminate the primary degradation mechanism associatecd with HID lamps.
Without electrodes in its design, the ELS-250 can offer extremely long life and unprecedented reliablility in technical lighting applications. It excess over 10,000 hours of lamp life while
a tpical metal halide system only last up to 2,000 hours of lamp life.
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Spectrum and Color Rendering Property
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*The spectral output shown on the graph were obtained via 8mm diameter core liquid light guide.
The ELS-250 produces a perfect continual spectrum in VIS region, 400nm to 750nm. Heat transfer is eliminated by its nature of spectrum from the electrodeless lamp that does not emits IR radiation.
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ELS-250 Color Rendering Properties |
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The ELS-250 is ideal for technical lighting applications where high CRI is required for accurate color rendering of illuminated objects.
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User friendly menu and comprehensive display for easy unit operation and maintenance.
- Lamp ON/OFF
- Shutter Activation OPEN/CLOSE
- Light Intensity Adjustment(30 to 100%)
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*All of those features can be controled remotely by using RS232C.
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Light Control and Shutter
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Light intensity can be quickly and reliably set from 30% to 100%.
You can easily set the desirable percentage with the digital panel of the main unit just by pressing UP and DOWN buttons.
The ELS-250 is also equipped with an internal shutter which
activated by button or RS232C commands.
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Asahi Spectra produces many varieties of precise
optical filters to help modification of spectrul output. You can
select the filters from our optical
filters page to fit your application.
This filter holder holds;
-50x50mm
-Φ50mm
with thickness between 1.0mm to 7.0mm
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The illuminated light is delivered to the illuminated area via fiber light guide. We recomend to use ELS-250 with our original light guides but it is also compatible with most major light guides with optic fiber adapter. Please contact us to discuss your adapter needs prior to purchasing.
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Spectral Performance - Light Guides
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1. Hybrid Light
Guide
Active core: Dia. 10mm
Length: 1,500mm
NA: 0.57
Bending Radius: R=50mm
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2. Liquid Light
Guide
Active core: Dia. 8mm
Length: 1,500mm
NA: 0.59
Bending Radius: R=100mm
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3. Liquid Light
Guide
Active core: Dia. 3mm
Length: 1,500mm
NA: 0.59
Bending Radius: R=40mm
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*ELS-250 can be attached to your microscope via dia. 3mm liquid light guide with microscope adapter. Please contact us to find out an appropriate adapter for your microscope.
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Collimating lense reduces the divergence of light
from the light guide and provide uniform light output. It is suitable
for directional backlighting which requires clear silhouette of
an object.
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