Kowa Industrial Lens and Camera Catalog - Catalog - Page 61
�"｜IR-CORRECTED(VIS-SW) ��MEGAPIXEL �.�µm
Model
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LM��HC-VIS-SW
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LM��HC-VIS-SW
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LM��HC-VIS-SW
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LM��HC-VIS-SW
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LM��HC-VIS-SW
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LM�HC-VIS-SW
HC-VIS-SW Series
Format Size (Inch)
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◎ �" format and ��MP resolution (�.�μm)
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● Compatible ◇ Suitable * Incompatible
LM�HC-VIS-SW transmission
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transmission (%)
◎ Focus shift corrected from ��� - ����nm.
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◎ Special extra low dispersion (XD) glass is utilized to
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greatly reduce chromatic aberration.
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◎ Floating mechanisms in all models provide high optical
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Wavelength (nm)
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performance from close range to infinity.
◎ Low distortion design
◎ Extra wide-band multi-coating
■ Near infrared corrected lens
A feature of the near infrared corrected lens is that
imaging is possible through limiting the focus
shifting amount even when the wavelength changes
between the frequency of visible light to the
frequency of near infrared light. In normal lenses
used for near infrared or for visible light, focus
shifting occurs when the wavelength is changed due
to the difference in the refractive index caused by
the wavelength. However, this does not occur when
using the exclusively designed near infrared
corrected lenses which utilize special extra low
dispersion glass (XD lenses).
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NIR
Visible light
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■ Example of focus shifting
* Focuses at ����nm
SWIR lens
Focus
shifting
Near infrared corrected lens
Visible light
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Wavelength (nm)
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SWIR
Near infrared light
Visible light
Near infrared light �
Near infrared light �
Change in
wavelength
Change in
wavelength
