{"product_id":"qhyccd-qhy991","title":"QHYCCD QHY991 Class 1 SWIR Camera","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eClass 1 Scientific SWIR Camera\u003c\/li\u003e\n\u003cli\u003eSony InGaAs Sensor Technology\u003c\/li\u003e\n\u003cli\u003eBroad Spectral Response (400-1700 nm)\u003c\/li\u003e\n\u003cli\u003eActive Air and Liquid Cooling Support\u003c\/li\u003e\n\u003cli\u003eStandard 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\u003eQHY991 Class 1 SWIR Camera\u003c\/h2\u003e\n\u003cp\u003eThe QHY991 is a Class 1 scientific short-wave infrared (SWIR) camera built around a high-sensitivity Sony InGaAs sensor, designed for applications requiring a broad spectral response from visible light into the SWIR spectrum.\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: Broad SWIR Spectral Response\u003c\/h3\u003e\n\u003cp\u003eAt the core of the QHY991 is a Sony InGaAs sensor, which provides high sensitivity across an exceptionally broad spectral range. This allows for detailed imaging in wavelengths beyond the reach of typical silicon-based sensors. The sensor's architecture, which utilizes Cu-Cu interconnect technology, is engineered to minimize fixed-pattern noise and reduce the pixel defect ratio, ensuring clean data for scientific analysis.\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\u003eEssential Cooling for Low-Noise InGaAs Operation\u003c\/h3\u003e\n\u003cp\u003eInGaAs sensors inherently produce a higher dark current than their silicon counterparts, making active cooling a critical requirement for long-exposure or high-precision measurements. The QHY991 addresses this with a powerful cooling system that supports both air and liquid cooling methods. This thermal management is essential for stabilizing the sensor and reducing thermal noise to achieve the highest possible signal-to-noise ratio in demanding conditions.\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\u003eC-Mount and Filter Integration for Lab Use\u003c\/h3\u003e\n\u003cp\u003eDesigned for straightforward integration into scientific and industrial setups, the QHY991 features a standard C-mount thread. The camera body also includes an integrated filter holder designed for common filter sizes used in laboratory applications. This allows you to easily install SWIR-pass or other specialized filters required for your specific imaging or measurement task without complex adapters.\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 types of applications is the QHY991 SWIR camera designed for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eQHY991\u003c\/strong\u003e is a scientific camera ideal for applications that benefit from imaging in the short-wave infrared spectrum. This includes semiconductor inspection, material sorting, anti-counterfeiting, biological imaging, and specialized astronomical imaging where SWIR can reveal details obscured in visible light.\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 QHY991's InGaAs sensor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInGaAs sensors, by nature, generate more thermal noise (dark current) than silicon CMOS or CCD sensors. The \u003cstrong\u003eQHY991's\u003c\/strong\u003e robust air and liquid cooling support is essential to lower the sensor's operating temperature, which significantly reduces this noise. Lower noise is critical for achieving clear, high-contrast images, especially during longer exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the QHY991's broad spectral response help with imaging a planet like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eJupiter's atmosphere has distinct absorption and reflection bands in the SWIR spectrum, particularly for methane. Using the \u003cstrong\u003eQHY991\u003c\/strong\u003e with an appropriate methane filter would allow you to capture high-contrast images of Jupiter's cloud structures, revealing details about storm systems and atmospheric layers that are invisible to standard RGB cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the Cu-Cu interconnect technology in the QHY991 sensor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Cu-Cu (copper-to-copper) interconnect technology used in the \u003cstrong\u003eQHY991's\u003c\/strong\u003e Sony sensor allows for a more direct and efficient connection between pixel layers. This advanced manufacturing technique results in significantly lower fixed-pattern noise (FPN) and a lower defect pixel ratio, leading to cleaner and more uniform images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I mount filters on the QHY991 camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eQHY991\u003c\/strong\u003e includes an integrated filter holder designed to accept common filter sizes used in laboratory and industrial settings. This allows for the direct installation of SWIR-pass, bandpass, or other analytical filters into the optical path in front of the sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"Class 1\" signify for the QHY991 camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eClass 1\u003c\/strong\u003e typically refers to the grade of the sensor, indicating it meets the manufacturer's highest standards for quality. For scientific cameras, this usually means the sensor has a very low number of pixel defects and provides the most uniform response, making it suitable for quantitative measurement and analysis.\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\u003eProduct\u003c\/td\u003e\n\u003ctd\u003eScientific Cameras - QHY991\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor Class\u003c\/td\u003e\n\u003ctd\u003eClass 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectrum\u003c\/td\u003e\n\u003ctd\u003eSWIR (Short-Wave Infrared)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor Technology\u003c\/td\u003e\n\u003ctd\u003eInGaAs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling\u003c\/td\u003e\n\u003ctd\u003eAir Cooling (Liquid Supported)\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\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\n\u003ca href=\"https:\/\/davidastro.com\/pages\/qhyccd-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eQHYCCD Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"QHYCCD","offers":[{"title":"Default Title","offer_id":52942990049565,"sku":"QHY-110092","price":16520.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/QHYCCD-QHY990-QHY991-QHY992-SWIR-Cameras-1-110092_e0086cc8-b21b-4999-a85f-73e07d38bb4b.jpg?v=1789614983","url":"https:\/\/davidastro.com\/products\/qhyccd-qhy991","provider":"David Astro","version":"1.0","type":"link"}