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UV-coating CCD sensors

We offer UV-coating CCD sensors (monochrome linear sensors with elongated pixels) suitable for applications requiring high-sensitivity sensors, such as spectral analysis or barcode scanners. Thanks to the socket-mounted design, these sensors can be easily replaced via simple plug-and-play. You may choose our modified versions of the Toshiba TCD1304DG sensor or the Sony ILX554B sensor, which significantly expand application possibilities and serve as an ideal solution for functional enhancement.

A typical limitation of conventional sensors is that short-wavelength light (e.g., deep blue or ultraviolet) is absorbed by the surface structure of the sensor and cannot be recognized as a signal. The shorter the wavelength, the less the sensor's output signal is affected by illumination. Our modified sensors are coated with a thin-layer material that absorbs ultraviolet light and emits visible light. Nearly every incident ultraviolet photon is converted into a visible photon. However, due to the randomness of the emission direction, only about 15% to 98% of these photons can be detected by the sensor. The models we offer: Toshiba TCD1304DG sensor and Sony ILX554B sensor.

product details

Product Features:

1.CCD Enhancements（CCD Enhancement Coatings）

Many detectors including front-illuminated CCDs, photodiode linear arrays, and select CMOS devices lack quantum efficiency in the UV spectral region. The application of a thin coating of METACHROME (also known as Lumogen E) to the surface of these devices effectively, reliably and inexpensively achieves a dramatic increase in device sensitivity in the 120 to 430nm range. METACHROME is a composite phosphor coating that improves the sensitivity of detectors in blue-visible and ultraviolet (UV) wavelengths. For example, front-illuminated CCDs have virtually no response below 350 nm, and less than 5% quantum efficiency is typically observed at 400 nm. An uncoated front-illuminated CCD cannot be used between 120 and 350nm because it does not exhibit response to light below 350nm. However, a front-illuminated CCD with METACHROME coating may be used at a fraction of the cost of a back-illuminated CCD or photomultiplier tube (PMT).

2.Optical Properties

METACHROME emits light at approximately 540 to 580 nm when excited with light below 450 nm. The high conversion efficiency of Lumogen E, combined with the high quantum efficiency of detectors at the emission wavelength, make METACHROME an ideal UV "down converter" for silicon detectors. Front illuminated CCDs having METACHROME coating exhibit vastly improved quantum efficiency below 350nm as shown in the chart below. The thin layer of METACHROME becomes transparent at wavelengths greater than 450nm and therefore has no detrimental effect on the quantum efficiency of a detector in the visible and near-infrared. Measurements have been performed to determine the effects of METACHROME coatings on spatial resolution. The contrast-transfer functions for a coated and uncoated CCD with a 20-µm square pixel were compared and found to be identical.

Product Parameters

useable range of exitation	150 nm to 450 nm
range of emission	500 nm to 650 nm
peak emission	530 nm
fluorescence decay time	some ns
phosphorescence	not significant
thickness of coating	values on request
MTF reduction	MTF at 250 lp/mm is reduced by 50 %
aging	aging is affected by four parameters:
	1.wavelength of illumination
	2.intensity of illumination
	3.temperature (can be reduced by pre-aging)
	4.atmosphere
pre-aging	available on request
effective quantum efficiency	typically the effective quantum efficiency for the use- able range of exitation is about 40 % of the quantum efficiency at 530 nm of the original device

Application Scenario:

1.Applications in precision medical analysis equipment, such as: DNA sequencing and gene analysis systems, proteomics and biomolecular analysis, flow cytometers, microbial detection and drug development, etc.

2.Applications in the field of oil detection, enabling precise analysis of contaminants, compositional changes, and degradation levels in oil.

3.Process control in industries such as metallurgy, casting, machinery, and metal processing.

4.Applications in laboratory equipment and spectral analysis equipment.

Application Scenario:

2.Applications in the field of oil detection, enabling precise analysis of contaminants, compositional changes, and degradation levels in oil.

3.Process control in industries such as metallurgy, casting, machinery, and metal processing.

4.Applications in laboratory equipment and spectral analysis equipment.

Product Details