280nm 대역 통과 필터

Context: This patent describes a Capillary Electrophoresis (CE) system designed to detect proteins without using external dye labels. It relies on "Native Fluorescence Detection" (NFD).

Usage of Filter: The 280nm bandpass filter (specifically cited as having a transmission bandwidth of 270–290nm) is positioned in the optical path between the light source (laser-driven plasma) and the capillary tube containing the sample.

Function: Its function is to strictly isolate the excitation wavelength. It blocks all stray light from the broadband source, allowing only the 280nm UV light to pass through and irradiate the protein sample.

Result: This specific excitation causes the Tryptophan amino acids within the proteins to fluoresce naturally at ~350nm. By removing background noise with the filter, the system achieves a Limit of Detection (LOD) of 10-20 nM, which is 25 times more sensitive than standard UV absorbance methods.

Context: This patent (assigned to LARQ Inc.) covers portable water purification devices, such as self-cleaning water bottles, which use UV-C LEDs to neutralize bacteria in the liquid.

Usage of Filter: The 280nm bandpass filter is used over the internal photodetector (monitor sensor) located inside the cap or base of the device.

Function: The filter blocks visible light and ambient solar radiation (if the bottle is open or translucent) from reaching the sensor, ensuring the sensor measures only the intensity of the germicidal 280nm light emitted by the internal LEDs.

Result: This allows the device’s processor to accurately calculate the cumulative germicidal dose delivered to the water. It ensures the water is fully sterilized before stopping the cycle, optimizing battery life by preventing "over-dosing" beyond what is necessary.

Context: This patent describes a flexible or wearable UV disinfection device (e.g., a mat or wrap) that conforms to the shape of an object (like a door handle or medical tool) to sterilize it.

Usage of Filter: The 280nm bandpass filter is integrated into the "feedback sensor" assembly embedded within the flexible substrate.

Function: The filter acts as a discriminator for the feedback loop. It ensures the sensor detects only the reflected/backscattered 280nm light from the treatment surface, ignoring room lighting or other interference.

Result: This provides closed-loop verification, confirming that the target surface is actually receiving the UV-C radiation. If the sensor (behind the filter) does not detect the 280nm reflection (e.g., if the device is not wrapped correctly), the system can alert the user or shut down for safety.