컬렉션: 365nm 대역 통과 필터

365nm Laser or 405nm Laser?

Finding a true 365nm laser (as opposed to a standard UV flashlight) is actually quite specialized because most "UV lasers" sold consumer-side are actually 405nm (violet). True 365nm light is deep in the ultraviolet spectrum and is often used for high-end forensics, mineral validation, and laboratory curing.

When searching, be careful with products labeled "UV Laser Pointers" for $10–$20 on sites like eBay or Amazon.

• The Trap: Almost all of these are 405nm (violet light). 405nm is much cheaper to produce but doesn't "excite" fluorescent materials nearly as well as 365nm.
• The Difference: A true 365nm light is nearly invisible to the eye until it hits a fluorescent object (which then glows brightly). 405nm looks like a bright purple laser beam.

How to "Tighten" the Spectrum

If your application requires an even narrower band than the standard 10nm FWHM (for example, in high-precision lab microscopy), you can use a ZWB2 Filter or a Bandpass Filter.

• ZWB2 Filter: A piece of "Black Glass" often found on high-end UV flashlights. It doesn't narrow the 365nm peak itself, but it aggressively cuts off any "tail" of visible light above 400nm, making the beam look "pure" and invisible to the eye.
• Bandpass Filter: A specialized optical glass that can narrow the light down to a 2nm – 5nm window, though this will significantly reduce the total power output.