Custom Beamsplitters

The advanced and reliable circuitry of the HTC Series achieves 0.0009°C temperature stability. Its low profile package is ideal for designs with space constraints. The ultrastable linear, PI control loop offers maximum stability while the bipolar current source has been designed for higher efficiency. The HTC1500 drives up to 1.5 A for either Thermoelectrics (bipolar) or Resistive Heaters (unipolar). The HTC3000 drives up to ±3 A. An evaluation board simplifies prototyping: HTCEVALPCB. A heatsink that mounts directly to the HTC is available: HTCHTSK. The HTC1500 is designed for 0.031" thick printed circuit boards (PCBs). The HTC1500-62 is designed for 0.062" thick PCBs. The HTC Series temperature controllers are easily configured for any design. Virtually any type of temperature sensor can be used with the HTC and a built in sensor bias current source simplifies use with resistive temperature sensors. The independently adjustable Proportional Gain (P) and Integrator Time Constant (I) can be modified to optimize temperature overshoot and stability.Other features offer added flexibility. A single resistor sets the maximum output current to load. Add a diode to operate resistive heaters with a unipolar output current. An onboard reference voltage simplifies potentiometer control of the temperature setpoint. You can also choose to operate remotely with an external setpoint voltage. Two monitor pins provide access to the temperature setpoint voltage and the actual sensor voltage.The HTC1500 has proven reliable in such diverse fields as medical, defense, communications and manufacturing. The HTC is particularly suited to applications where temperature is scanned across ambient. Key Features Compact Size - 1.5 and 3.0 A Models Interfaces with Thermistors, IC Sensors, &RTDs Single supply operation +5 V to +12 VDC (contact factory for higher voltage operation) +11 V compliance with +12 V input Stabilities as low as 0.0009°C Temperature Setpoint, Output Current Limit, Sensor Bias, Proportional Gain, and Integrator Time Constant are User Adjustable Monitor outputs for Temperature Setpoint and Actual Temperature Linear Bipolar or Unipolar Output operates thermoelectrics or resistive heaters

Wavelength 351-4500 nm; Active Aperture 2-12 mm; Bandwidth 0.3-12 nm; Acousto-optic tunable filters (AOTF) are used to rapidly and dynamically select a specific wavelength from a broadband or multi-line laser source. As the applied RF frequency is varied, the transmitted wavelength changes, “tuning” the wavelength of the beam or image in tens of microseconds or less. An extensive line of AO tunable filters is available for wavelength from the UV through mid-IR, with resolution bandwidths of less than 1nm, with options such as large-aperture imaging filtering and sideband suppression. Fiber-coupled acousto-optic tunable filters devices are available upon request.AOTFs with apertures less than 6 mm are typically used that have less than tens of nm of resolution bandwidth at NIR wavelengths and less than ten nm at visible wavelengths. A quasi-collinear AOTF can deliver < 1 nm resolution bandwidth if operated with highly collimated light. AOTFs with larger apertures (> 6 mm) are a powerful tool for spectral imaging, rapidly and efficiently scanning an entire image in wavelength. This is of use in high-speed applications like hyperspectral imaging, confocal microscopy and on-line process control. The cost of AOTFs increases significantly for very large apertures, but they deliver unmatched speed for time-sensitive multispectral measurements in industry and biotech, approaching real-time video rate spectral imaging.  Gooch & Housego’s acousto-optic tunable filters are manufactured using high quality TeO2 crystals grown in-house, polished and fabricated to rigorous standards, with wavelengths from 350 nm to 4.4 µm in a wide variety of apertures and resolution bandwidths. It is possible to filter images up to 25 mm across, meet exceptionally low driver power requirements or design an AOTF to select and transmit multiple discrete wavelengths.Acousto-optic tunable filters often exhibit light leakage outside the resolution bandwidth of interest, typically at 10-20 dB below peak power. This is due to the response function of the AOTF itself but can be minimized using G&H’s patented techniques. Sideband suppression is available in several models, reducing out of band side lobes by greater than 20 dB relative to the primary beam. The AOTF product family includes application-specific solutions for illumination or excitation wavelength selection, as well as multispectral or hyperspectral imaging. For best performance, we recommend a matched RF driver, including the latest digital frequency synthesizer (DFS) driver technology and random access wavelength control. Applications: Confocal Microscopy; Fluorescence Imaging; Hyperspectral Imaging; Imaging Spectroscopy; Laser Wavelength Tuning; On-Line Process Control; Spectroscopy; Wavelength Selection Series Wavelength Active Aperture Bandwidth Downloads AOTF 2837-31 351 - 430 nm 2.5 mm 1.0 nm Datasheet      TF525-250-6-3-GH19A 400 - 650 nm 3 mm 3 nm Datasheet      AOTF 3151-01 400 - 650 nm 2.5 mm 2.5 nm Datasheet      TF550-300-4-6-GH57A AOTF 400 - 700 nm 6 mm 4 nm Datasheet      TF560-280-1-5-NT2 AOTF 420 - 700 nm 5 mm 0.3 nm Datasheet      AOTF 2838-01 450 - 670 nm 2.5 mm 1.3 nm Datasheet      AOTF 2885-02 450 - 670 nm 2.5 mm 2 nm Datasheet      AOTF 2885-04 450 - 670 nm 2.5 mm 4 nm Datasheet      TF625-350-2-11-BR1A AOTF 450 - 800 nm 11 x 12 mm 1.5 nm Datasheet      TF850-500-10-6-GH58A AOTF 600 - 1100 nm 6 mm 10 nm Datasheet      AOTF 2986-01 640 - 1100 nm 2.5 mm 5 nm Datasheet      TF950-500-1-2-GH96 700 - 1200 nm 2 mm 0.6 nm       AOTF 2996-01 1100 - 2000 nm 2.5 mm 12 nm Datasheet  Driver Driver I-TF1650-1100-1-3-GH107 1100 - 2200 nm 3 mm 1.0 nm       TF1875-1250-10-6-GH59A 1250 - 2500 nm 6 mm 10 nm Datasheet      I-TF2250-1500-2-3-GH107 1500 - 3000 nm 3 mm 2 nm       I-TF3250-2500-3-3-GH107 2000 - 4500 nm 3 mm 3 nm