# 9.1 mm F0.8 LWIR Lens for MINI 640-2 (640x512) | TORSUN TECH A 9.1 mm F0.8 LWIR lens configuration listed for the MINI 640-2, with a 48.74° × 39.01° field of view. Discuss the module and lens assembly for your project. Source: https://thermal.torsuntech.com/products/lwir-lens-9-1mm/ [Thermal imaging](https://thermal.torsuntech.com/) / [Products](https://thermal.torsuntech.com/products/) / 9.1 mm F0.8 Shown as part of the MINI 640-2 assembly. Lens supply scope is agreed in the quotation. LWIR lens configuration # 9.1 mm F0.8 A 9.1 mm F0.8 lens configuration listed for the MINI 640-2, with a 48.74° × 39.01° field of view. Discuss the complete module and lens assembly for your project. [Order a sample](https://thermal.torsuntech.com/contact/?request=sample&from=%2Fproducts%2Flwir-lens-9-1mm%2F&product=9.1+mm+F0.8) [Request a quote](https://thermal.torsuntech.com/contact/?request=quotation&from=%2Fproducts%2Flwir-lens-9-1mm%2F&product=9.1+mm+F0.8) Discuss model, lens, interface and included items before ordering. [Product overview PDF](https://thermal.torsuntech.com/downloads/TORSUN-9-1mm-F08-Lens-Overview-R2.pdf) **9.1 mm** Focal length **F0.8** Aperture **48.74° × 39.01°** Field of view **1.33 mrad** IFOV Product overview ## A lens option for the MINI 640-2 platform. ### Match the field of view Discuss the required scene coverage and working distance alongside the selected module. ### Confirm the assembly Review the lens, flange, mounting and complete assembly envelope before design-in. ### Agree the supply scope Confirm whether the quotation covers the module assembly, the lens configuration or other included items. Technical reference ## Specifications This is a lens configuration option. Field of view and fit depend on the selected detector, optics and mechanical assembly. Confirm the configuration before ordering. [Request a quote](https://thermal.torsuntech.com/contact/?request=quotation&from=%2Fproducts%2Flwir-lens-9-1mm%2F&product=9.1+mm+F0.8) 9.1 mm F0.8 · Listed configuration | Parameter | Value | | --- | --- | | Optics | | | Focal length | 9.1 mm | | Aperture | F0.8 | | Field of view | 48.74° × 39.01° on the listed MINI 640-2 configuration | | IFOV | 1.33 mrad | | Listed focus range | 0.3 m to infinity | | Depth of field (fixed focus) | 1.5 m to infinity; distinct from focusing range | | Assembly | | | Lens + flange weight | 13 g ±1 g, lens + flange | | Listed platform | MINI 640-2 | | Supply scope | Confirm module, lens and included items in the quotation | ENGINEERING & PROCUREMENT ## Questions before design-in ### Is depth of field the same as focusing range? No. For the listed 9.1 mm F0.8 configuration, the manual gives a typical focusing range of 0.3 m to infinity and a depth of field of 1.5 m to infinity when focus is fixed. Confirm whether the ordered assembly is fixed-focus or manually adjustable. ### Which detector does the quoted field of view apply to? The 48.74° × 39.01° field of view and 1.33 mrad IFOV refer to the listed MINI 640-2 and 9.1 mm F0.8 configuration. They are not universal values for any 9.1 mm lens. Match the detector, lens and mechanical configuration in the quotation. ### Can the lens be ordered separately? This page describes a lens configuration for the MINI 640-2 platform. Standalone lens supply is not confirmed. Lenses are fitted and focused by the factory, so specify the lens with your module order and request confirmation of compatibility, included items and availability. ### Documentation basis Source: MINI 640-2 Product Manual V1.0, dated 19 September 2025, PDF pages 5–6 (product selection and specifications). Technical review: 24 September 2026 [MINI 640-2 integration notes](https://thermal.torsuntech.com/resources/mini-640-2-integration-notes/) [Read purchasing questions](https://thermal.torsuntech.com/resources/thermal-module-procurement/) Prepare the next step ## Order a sample Tell us the application, lens, output and quantity. We confirm the sample configuration and price before you order. [Request documents](https://thermal.torsuntech.com/contact/?request=documents&from=%2Fproducts%2Flwir-lens-9-1mm%2F&product=9.1+mm+F0.8) [Order a sample](https://thermal.torsuntech.com/contact/?request=sample&from=%2Fproducts%2Flwir-lens-9-1mm%2F&product=9.1+mm+F0.8) Product documents ## Information for your evaluation. Start with the product overview. Ask us for the technical documents available for your selected configuration. ### 9.1 mm F0.8 LWIR lens configuration · Product overview · PDF · R2 [Download PDF](https://thermal.torsuntech.com/downloads/TORSUN-9-1mm-F08-Lens-Overview-R2.pdf) Purchasing support ## From evaluation to ordering. 01 ### Configuration coordination We clarify your product and application requirements, then coordinate supplier confirmation of the proposed configuration. 02 ### Sample confirmation We record the agreed sample model, configuration and included items, then review any changes before an order proceeds. 03 ### Order follow-up We track supplier progress, coordinate order documents and follow up on open issues, keeping the next step and responsible party clear. [Request a quote](https://thermal.torsuntech.com/contact/?request=quotation&from=%2Fproducts%2Flwir-lens-9-1mm%2F&product=9.1+mm+F0.8) Continue exploring ## Related component [All products](https://thermal.torsuntech.com/products/) Thermal imaging module ### [MINI 640-2](https://thermal.torsuntech.com/products/mini-640-2/) A compact core for thermal observation. - Resolution: 640 × 512 - Pixel pitch: 12 μm - Detector frame rate: 60 Hz [View product details](https://thermal.torsuntech.com/products/mini-640-2/) --- TORSUN TECH · CATC Building 2, Shipai Town, Dongguan, Guangdong, China · info@torsuntech.com · Tel / WeChat / WhatsApp +86 180 2518 5996 · Enquiry: https://thermal.torsuntech.com/contact/