MWIR 3–5 μm · LWIR 8–12 μm

Infrared lens families shown by band and focus architecture.

Browse motorized MWIR continuous zoom, LWIR manual focus and dual-FOV, plus compact athermalized fixed-focus objectives. Product images and technical parameters are paired from the same reference record.

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MWIR · 3–5 μm

Continuous-zoom lens assemblies

Two motorized references for cooled 640 × 512 / 15 μm detector systems, covering wide-area search through narrow-field observation.

MWIR 3–5 μm20× zoomMotorized

15–300 mm MWIR Continuous-Zoom Lens

Continuous-zoom MWIR assembly for switching from wide-area search to narrow-field observation.

Focal length15–300 mm
F/#4.0
Working wavelength3–5 μm
Detector reference640 × 512 / 15 μm

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Focal length: 15–300 mm
F/#: 4.0
Working wavelength: 3–5 μm
Detector reference: 640 × 512 / 15 μm
Field of view: 35.5° × 28.7° / 1.8° × 1.5°
Average transmission: ≥85% AR reference
Distortion: 4%
Focus: Motorized, 50 m–∞
Weight: ≤600 g
Dimensions: Φ85 × 111.7 mm
Operating / storage: −40 to +60 °C / −50 to +70 °C
Sealing reference: Front element IP67

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MWIR 3–5 μm15× zoom≤325 g

18–275 mm Compact MWIR Continuous-Zoom Lens

Compact continuous-zoom MWIR reference with motorized focusing.

Focal length18–275 mm
F/#5.5
Working wavelength3–5 μm
Detector reference640 × 512 / 15 μm

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Focal length: 18–275 mm
F/#: 5.5
Working wavelength: 3–5 μm
Detector reference: 640 × 512 / 15 μm
Field of view: 29.9° × 24.1° / 2° × 1.6°
Average transmission: ≥90% AR reference
Distortion: 4.4%
Focus: Motorized, 50 m–∞
Weight: ≤325 g
Dimensions: Φ62 × 75 mm
Operating / storage: −40 to +60 °C / −50 to +70 °C
Sealing reference: Front element IP67

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LWIR · 8–12 μm

Manual-focus and dual-field-of-view lenses

Longer-range manual focusing and two discrete focal lengths provide alternatives where a fixed athermalized lens is not sufficient.

LWIR 8–12 μmF/1Manual focus

75 mm F/1 Manual-Focus LWIR Lens

Longer-focal-length LWIR objective with manual focusing for a 12 μm detector reference.

Focal length75 mm
F/#1.0
Working wavelength8–12 μm
Detector reference640 × 512 / 12 μm

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Focal length: 75 mm
F/#: 1.0
Working wavelength: 8–12 μm
Detector reference: 640 × 512 / 12 μm
Field of view: 5.86° × 4.69°
Average transmission: ≥88% DLC reference
Distortion: −0.8%
Focus: Manual, 5 m–∞
Weight: ≤260 g
Dimensions: Φ81.5 × 92.36 mm
Operating / storage: −40 to +60 °C / −50 to +70 °C
Sealing reference: Front element IP67

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LWIR 8–12 μmDual FOVF/1.1

25/50 mm Dual-FOV LWIR Lens

Two discrete focal lengths in one LWIR assembly for situational and narrow-field viewing.

Focal length25 / 50 mm
F/#1.1
Working wavelength8–12 μm
Detector reference640 × 512 / 12 μm

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Focal length: 25 / 50 mm
F/#: 1.1
Working wavelength: 8–12 μm
Detector reference: 640 × 512 / 12 μm
Field of view: 17.5° × 14° / 8.8° × 7°
Average transmission: ≥85% DLC reference
Distortion: −3.6% / −0.1%
Focus: Manual, 2.5 m–∞ / 5 m–∞
Weight: ≤280 g
Dimensions: Φ70 × 61 mm
Operating / storage: −40 to +60 °C / −50 to +70 °C
Sealing reference: Front element IP67

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LWIR · 8–12 μm

Athermalized fixed-focus objectives

Configurations range from ultra-wide 3 mm coverage to 100 mm narrow-field imaging, including compact options for embedded and airborne payloads.

LWIR 8–12 μm1280 × 1024Athermalized

100 mm F/1.2 Athermalized LWIR Lens

Long-focal-length athermalized LWIR objective for a high-resolution 12 μm detector reference.

Focal length100 mm
F/#1.2
Working wavelength8–12 μm
Detector reference1280 × 1024 / 12 μm

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Focal length: 100 mm
F/#: 1.2
Working wavelength: 8–12 μm
Detector reference: 1280 × 1024 / 12 μm
Field of view: 8.8° × 7°
Average transmission: ≥90% HD reference
Distortion: 1%
Focus / depth of field: Fixed, 150 m–∞
Weight: ≤410 g
Dimensions: Φ93 × 89 mm
Coating reference: AR / HD
Environment: −40 to +60 °C; front element IP67

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LWIR 8–12 μmF/1≤70 g

35 mm F/1 Athermalized LWIR Lens

Compact medium-field athermalized objective for 640 × 512 / 12 μm detectors.

Focal length35 mm
F/#1.0
Working wavelength8–12 μm
Detector reference640 × 512 / 12 μm

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Focal length: 35 mm
F/#: 1.0
Working wavelength: 8–12 μm
Detector reference: 640 × 512 / 12 μm
Field of view: 12.5° × 10°
Average transmission: ≥90% HD reference
Distortion: 1.9%
Focus / depth of field: Fixed, 25 m–∞
Weight: ≤70 g
Dimensions: Φ42 × 32.5 mm
Coating reference: AR / HD
Environment: −40 to +60 °C; front element IP67

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LWIR 8–12 μm132° FOVUltra-wide

3 mm Ultra-Wide Athermalized LWIR Lens

Ultra-wide F/1 LWIR objective for maximum scene coverage at short focal length.

Focal length3 mm
F/#1.0
Working wavelength8–12 μm
Detector reference640 × 512 / 12 μm

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Focal length: 3 mm
F/#: 1.0
Working wavelength: 8–12 μm
Detector reference: 640 × 512 / 12 μm
Field of view: 132° × 109.4°
Average transmission: ≥85% DLC reference
Distortion: −72%
Focus / depth of field: Fixed, 0.2 m–∞
Weight: ≤105 g
Dimensions: Φ44 × 50 mm
Environment: −40 to +60 °C; front element IP67

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LWIR 8–12 μm100° FOVF/1

4 mm Wide-Angle Athermalized LWIR Lens

Wide-angle athermalized LWIR objective for compact thermal modules.

Focal length4 mm
F/#1.0
Working wavelength8–12 μm
Detector reference640 × 512 / 12 μm

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Focal length: 4 mm
F/#: 1.0
Working wavelength: 8–12 μm
Detector reference: 640 × 512 / 12 μm
Field of view: 100° × 82.5°
Average transmission: ≥87% DLC reference
Distortion: −33%
Focus / depth of field: Fixed, 1 m–∞
Weight: ≤75 g
Dimensions: Φ32.5 × 36 mm
Environment: −40 to +60 °C; front element IP67

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LWIR 8–12 μm≤15 gCompact payload

9.1 mm Compact Athermalized LWIR Lens

Very-low-mass LWIR objective for embedded systems and compact airborne payloads.

Focal length9.1 mm
F/#1.0
Working wavelength8–12 μm
Detector reference640 × 512 / 12 μm

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Focal length: 9.1 mm
F/#: 1.0
Working wavelength: 8–12 μm
Detector reference: 640 × 512 / 12 μm
Field of view: 47.2° × 38.2°
Average transmission: ≥92% HD reference
Distortion: −3%
Focus / depth of field: Fixed, 0.5 m–∞
Weight: ≤15 g
Dimensions: Φ20.9 × 16 mm
Coating reference: AR / HD
Environment: −40 to +60 °C; front element IP67

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LWIR 8–12 μm1280 × 1024F/1

25 mm High-Resolution Athermalized LWIR Lens

High-resolution 25 mm LWIR objective matched to a 1280 × 1024 / 12 μm detector reference.

Focal length25 mm
F/#1.0
Working wavelength8–12 μm
Detector reference1280 × 1024 / 12 μm

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Focal length: 25 mm
F/#: 1.0
Working wavelength: 8–12 μm
Detector reference: 1280 × 1024 / 12 μm
Field of view: 34.2° × 27.6°
Average transmission: ≥86% HD reference
Distortion: 1%
Focus / depth of field: Fixed, 20 m–∞
Weight: ≤120 g
Dimensions: Φ48 × 31.59 mm
Coating reference: AR / HD
Environment: −40 to +60 °C; front element IP67

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Infrared RFQ checklist

Eight inputs for a useful first review

01MWIR 3–5 μm or LWIR 8–12 μm

02Detector resolution and pixel pitch

03Focal length or horizontal/vertical FOV

04F/# and cold-shield data if applicable

05Fixed, manual, motorized or continuous zoom

06Working distance and image-quality target

07Envelope, mount, mass and temperature

08Prototype, volume and test documents

Factory visits and supplier audits by appointment.

For qualified B2B projects, the selected production or integration facility may be visited after the scope, supplier and required documents are confirmed.

Reference policy: Numerical values shown are engineering references. The final quotation, drawing and sample approval define performance, coating, sealing, MOQ and delivery.

Infrared-optics contactsales@tuolango.com

Attach the detector datasheet and describe the target scene, range, FOV and environment.

Start with the band, detector and field of view.

We will narrow the focus architecture and reference configuration from there.

Email sales@tuolango.com