{"product_id":"qhyccd-qhy990","title":"QHYCCD QHY990 Series SWIR Camera","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eSony InGaAs Sensor for Short-Wave Infrared (SWIR) Imaging\u003c\/li\u003e\n\u003cli\u003eBroad Spectral Response from 400 nm to 1700 nm\u003c\/li\u003e\n\u003cli\u003eHigh 77% Quantum Efficiency at 1200 nm\u003c\/li\u003e\n\u003cli\u003eRegulated Air Cooling to 35°C Below Ambient\u003c\/li\u003e\n\u003cli\u003eIntegrated 25mm Filter Holder with C-Mount Interface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eQHY990 Series SWIR Camera\u003c\/h2\u003e\n\u003cp\u003eThe QHY990 series scientific cameras harness the Sony InGaAs sensor to deliver high-sensitivity imaging across a broad 400–1700 nm spectral range. Reaching a peak Quantum Efficiency of 77% at 1200 nm, these cameras are engineered for demanding short-wave infrared (SWIR) applications. A powerful air cooling system achieves a sensor temperature 35°C below ambient, critical for managing the higher dark current inherent in InGaAs sensors and ensuring low-noise results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSony InGaAs Sensor: 77% QE Across the 400-1700 nm SWIR Band\u003c\/h3\u003e\n\u003cp\u003eAt the core of the QHY990 is a Sony InGaAs sensor designed for scientific SWIR detection. Its spectral response extends from visible blue light at 400 nm well into the infrared at 1700 nm, with a notable peak QE of 77% at 1200 nm. This sensitivity makes it ideal for applications like spectroscopy, material analysis, and night vision research. The sensor's Cu-Cu interconnect technology also minimizes fixed-pattern noise (FPN) and reduces the pixel defect ratio, producing cleaner, more uniform data.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDeep Cooling for InGaAs: 35°C Below Ambient via Air\u003c\/h3\u003e\n\u003cp\u003eInGaAs sensors generate significantly more thermal noise than silicon-based sensors, making active cooling a necessity for any serious application. The QHY990 series integrates a high-efficiency cooling system that reduces the sensor temperature by a delta of 35°C below the ambient environment using forced air. For even more demanding scenarios, the camera also supports liquid cooling, which can achieve 45°C below ambient with standard water, and up to 80°C below ambient with chilled liquids, enabling longer exposures and lower noise floors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIntegrated 25mm Filter Holder with 17.5mm C-Mount Back Focus\u003c\/h3\u003e\n\u003cp\u003eDesigned for easy integration into laboratory and industrial optical systems, the QHY990 features a standard C-mount interface with a 17.5mm back focus distance. The camera includes a built-in filter holder designed for common 25mm filters. This allows for the straightforward installation of SWIR bandpass or other specialized filters directly into the camera body, simplifying the optical train and ensuring consistent results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat applications are best suited for the QHY990 SWIR camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe QHY990 is designed for scientific and industrial short-wave infrared (SWIR) applications. Its high sensitivity between \u003cstrong\u003e400 nm and 1700 nm\u003c\/strong\u003e makes it ideal for material sorting, agricultural analysis (e.g., moisture content), semiconductor inspection, medical imaging, and SWIR spectroscopy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is powerful cooling necessary for the QHY990's InGaAs sensor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInGaAs sensors inherently produce a higher dark current than silicon-based CMOS or CCD sensors. The QHY990's regulated cooling system, which can lower the sensor temperature by \u003cstrong\u003e35°C below ambient\u003c\/strong\u003e, is essential for reducing this thermal noise. This allows for longer exposure times and cleaner data, which is critical for detecting faint signals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the Sony sensor's Cu-Cu interconnect technology in the QHY990?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Copper-to-Copper interconnect is a modern sensor manufacturing technique that creates a more direct and efficient connection between pixel layers. For the QHY990, this results in significantly lower \u003cstrong\u003eFixed-Pattern Noise (FPN)\u003c\/strong\u003e and a very low defect pixel ratio, leading to cleaner, more uniform images that require less complex calibration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the QHY990 for SWIR spectroscopy to analyze moisture in food products?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an excellent application for the QHY990. Water has strong absorption bands in the SWIR range, particularly around 1450 nm. The camera's high sensitivity across the \u003cstrong\u003e400 nm to 1700 nm\u003c\/strong\u003e spectrum allows you to capture detailed spectral data in this region to quantify moisture content accurately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the QHY990 be used for silicon wafer inspection in a lab?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eSilicon becomes transparent at wavelengths longer than approximately 1100 nm. The QHY990's peak sensitivity at \u003cstrong\u003e1200 nm\u003c\/strong\u003e and its broad response out to \u003cstrong\u003e1700 nm\u003c\/strong\u003e allow it to see through silicon wafers to detect subsurface defects, cracks, or misalignments that are invisible to standard visible-light cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat filters can I install in the QHY990's built-in filter holder?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe QHY990 camera includes an integrated holder for standard \u003cstrong\u003e25mm diameter filters\u003c\/strong\u003e. This is a common size for laboratory applications, allowing you to easily install various SWIR bandpass, longpass, or shortpass filters to isolate specific wavelengths for your research.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor\u003c\/td\u003e\n\u003ctd\u003eSony InGaAs (IMX990\/IMX991\/IMX992)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor Technology\u003c\/td\u003e\n\u003ctd\u003eCu-Cu Interconnect\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectral Range\u003c\/td\u003e\n\u003ctd\u003e400 nm – 1700 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Quantum Efficiency\u003c\/td\u003e\n\u003ctd\u003e77% at 1200 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling System\u003c\/td\u003e\n\u003ctd\u003eRegulated Air and Liquid Cooling Support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir Cooling Performance\u003c\/td\u003e\n\u003ctd\u003eΔT = 35°C below ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLiquid Cooling (Water)\u003c\/td\u003e\n\u003ctd\u003eΔT = 45°C below ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLiquid Cooling (Cold Liquid)\u003c\/td\u003e\n\u003ctd\u003eΔT = 60°C to 80°C below ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eC-Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e17.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Holder\u003c\/td\u003e\n\u003ctd\u003eIntegrated, for 25 mm filters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBox contents not specified by the manufacturer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.qhyccd.com\/download\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/qhyccd-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eQHYCCD Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"QHYCCD","offers":[{"title":"Default Title","offer_id":52942989656349,"sku":"QHY-110090","price":14980.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/QHYCCD-QHY990-QHY991-QHY992-SWIR-Cameras-1_55586edd-0e7a-46bd-a1a9-857f4e0a065a.jpg?v=1789614966","url":"https:\/\/davidastro.com\/en-us\/products\/qhyccd-qhy990","provider":"David Astro","version":"1.0","type":"link"}