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NEW! LEDs with glass covering to boost LED output power
New types of light-emitting diodes with special glass covering to increase LED output optical power up to 3-5 times more were developed. With advantage of obtaining higher accuracy in detecting different gas, liquids and solids, and with compact size, low power consumption and high modulation range, LEDs with special glass covering will become one of the most important elements in sensing and analysis applications.

 

The following models are available:

Model Peak emission wavelength (µm) FWHM of the emission band (nm) Power (µW) Voltage (V) Maximum operating current (mA) Datasheet
    QCW mode  Pulse mode  QCW mode Pulse mode  
min max min max min max min max      
Lms34LED-CG 3.3 3.55 250 600 80 - 950 - 0.2-0.5 250 1000 Datasheet
Lms38LED-CG 3.7 3.94 500 700 45 - 500 - 0.2-0.8 250 1000 Datasheet
Lms43LED-CG 4.1 4.3 600 1200 25 - 500 - 0.2-0.8 250 1000 Datasheet

 



NEW! PDs with glass covering to increase photodiodes responsivity
New types of photodiodes with special glass covering to increase photodiodes responsivity up to 3-5 times more were developed. With advantage of obtaining higher accuracy in detecting different gas, liquids and solids, and with compact size, low power consumption and high modulation range, PDs with special glass covering will play an important part in sensing and analysis applications.

 

The following models are available:

Model Sensitive area (mm) Maximum sensitivity range (µm) Cut-off wavelength (µm) Dark current (µА*) Resistance (kOhm**) Capacitance (pF) Photo sensitivity (А/W) Noise equivalent power (W/Hz1/2) Specific detectivity (cm×Hz1/2/W) Datasheet
Lms36PD-03-CG 0.3 3.2-3.4 3.55-3.7 200-600 0.2-0.8 150-350 - - - Datasheet
Lms36PD-05-CG 0.5 2.2-3.4 3.6-3.7 50-1000 0.2-0.8 600-1400 - - - Datasheet
Lms43PD-03-CG 0.3 3.6-4.1 4.4-4.8 (1-6) ×103  (10-50) ×10-3 1300-2600 - - - Datasheet
Lms43PD-05-CG 0.5 3.5-4.2 4.5-4.8 (8-25) ×103 (4-6)×10-3 - - - - Datasheet

* Measured at 1V bias for Lms24PD models and at 0.1V bias for other models.

** Measured at 10mV bias.



LED Arrays and Matrics

Tiny size of an LED chip (0.35×0.35 mm), narrow-band emission spectrum, short response time and low thermal flux enables creating very compact multielement LED arrays and LED matrices emitting at one or different wavelengths.

LED matrix is a kind of arrangement of similar or different LED-chips mounted in a single compact package and driven together or independently. Such kind of emitter is a powerful radiation source for portable optical analyzing systems. Connecting LED chips emitting at different wavelengths and driving them independently or applying short current pulses sequentially to each chip enables scanning of a certain spectral range with the help of a very compact radiation source.

 

 

The number of array or matrix elements depends on the application and the chosen package type being chosen. Standard TO-type packages can be used. Packages with built-in thermoelectric modules (Peltier elements) provide temperature stabilization of LED-chip parameters. Use of these packages allows creating different variations of LED arrays and matrices arrangements. Some of them are presented below.

 



Standard 4-element one-wavelength LED matrices with peak wavelengths at 3.4 and 4.3 μm in TO18 package

Please see the Indroduction of a 4-element one-wavelength LED matrices at 3.4 and 4.3 μm .



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