Flir Tau II

Tau 2 LWIR Thermal Imaging Camera Cores HeatSecFlirTauII

Tau 2 is the latest generation product in FLIR’s Tau family of LWIR uncooled thermal imaging camera cores.

 

Two significant advances in Tau 2 are the introduction of:

  • Enhanced electronics for improved image processing; and
  • FLIR’s 336×256, 17μ-pitch sensor format (in addition to the 324×256, 25μ-pitch & 640×512, 17μ-pitch Tau 2 versions)

There is no difference in form or fit between Tau 2 and the first generation Tau cameras. The upgraded Tau 2 electronics enable additional functions and capabilities that are planned for release on a periodic basis. A comparison of the Tau2 version evolution can be found here: Tau Feature Comparison. Note that earlier versions of Tau (1.X) cannot be upgraded to the newer Tau 2 configuration.

 

Since the electronics are common between the Tau 2 – 640, Tau 2 – 336, and Tau 2 – 324, integrators have direct compatibility between the different camera formats, and most Tau camera versions share the same lens options.

 

FLIR also offers three low-cost Tau 2 options for applications that do not require high resolution imaging:

  • Tau2 160 a 160×128 with 25 μ-pitch
  • Tau2 162 a 160×128 with 50 μ-pitch
  • Tau2 168 a 160×128 with 34 μ-pitch

 

Download the FLIR Camera Controller GUI

 

Specifications

Overview

Tau 640

Tau 336

Tau 324

Thermal Imager Uncooled VOx Microbolometer
FPA / Digital Video Display Formats 640 × 512 336 × 256 324 × 256
Analog Video Display Formats 640 × 480 (NTSC); 640 × 512 (PAL)1
Pixel Pitch 17 μm 25 μm
Spectral Band 7.5 – 13.5 μm
Full Frame Rates 30 Hz (NTSC)
25 Hz (PAL)
30/60 Hz (NTSC)
25/50 Hz (PAL)
Exportable Frame Rates 7.5 Hz NTSC; 8.3 Hz PAL
Sensitivity (NEdT) <50 mK at f/1.0
Scene Range (High Gain) -25°C to +135°C -25°C to +100°C -25°C to +135°C
Scene Range (Low Gain) -40°C to +550°C
Time to Image <5.0 sec <4.0 sec
Factory Optimized Video Yes

Physical Attributes

Tau 640

Tau 336

Tau 324

Size (w/o lens) 1.75″ x 1.75″ x 1.18″
Lensed & Lensless Configurations Available Yes
Precision Mounting Holes (M2x0.4) on
3 sides (2 per side)
Yes
Sealable Bulkhead Mounting Feature
on Lens Barrel (M29×1.0), WFOV Only
Yes

Radiometric Features

Tau 640

Tau 336

Tau 324

Isotherms See Product Spec page 34 Section 3.3.3.1
Spot Meter Temperatures measured in central 4×4
Advanced Radiometry Improved accuracy, moveable spot meter, image metric data, T-Linear (digital output)
(OEM part number required, additional charge)

Image Processing & Display Controls

Tau 640

Tau 336

Tau 324

NTSC/PAL (field switchable) Yes
Image Optimization Yes
Digital Detail Enhancement Yes
Invert/Revert (analog and 8-bit digital) Yes
Polarity Control (black hot/white hot) Yes
Color & Monochrome Palettes (LUTs) Yes
Digital Zoom 2x, 4x, 8x 2x, 4x
Continuous Zoom Yes
Symbology (256 gray & 256 color) Yes, single-pixel resolution for all models

Digital Video

Tau 640

Tau 336

Tau 324

LVDS (14-bit or 8-bit) Yes
CMOS (14-bit or 8-bit) Yes
BT.656 (8-bit) Yes
Camera Link (Expansion Bus Accessory Module) Yes
Slow Video Option (factory configured) Yes

Interfacing

Tau 640

Tau 336

Tau 324

Primary Electrical Connector 50-pin Hirose
Input Power (max 2.5 amp during shutter) 4.0 – 6.0 VDC
Power Dissipation, steady state <1.2 W ~1.0 W
Flat-Field Correction (FFC) Duration <0.5 sec
Power Reduction Switch (disables analog video) Yes
RS-232 Compatible Communication 57,600 & 921,600 baud
External Sync Input/Output Yes
Discrete I/O Controls Available Yes (10-camera minimum)
Settable Splash Screens Yes (10-camera minimum)
User Configurability via SDK & GUI Yes
Dynamic Range Switching No Yes

Environmental

Tau 640

Tau 336

Tau 324

Operating Temperature Range -40°C to +80°C
Non-Operating Temperature Range -55°C to +95°C
Temperature Shock 5°/min
Operational Altitude +40,000 feet
Humidity 5% – 95% non-condensing
Vibration 4.3g three axis, 8 hr each
Shock 200g shock pulse w/ 11 msec sawtooth
ROHS Compliant

 

 

Wide Field of View (WFOV) Models

7.5 mm
f/1.4

9 mm
f/1.25 for Tau 324 & 336
f/1.4 for Tau 640

13 mm
f/1.25

19 mm
f/1.25

Tau 640
(17μ 640×512)
FoV
iFoV
90° x 69°
2.267 mr
69° x 56°
1.889 mr
45° x 37°
1.308 mr
32° x 26°
0.895 mr
Tau 336
(17μ 336×256)
FoV
iFoV
45° x 35°
2.267 mr
35° x 27°
1.889 mr
25° x 19°
1308 mr
17° x 13°
0.895 mr
Tau 324
(25μ 324×256)
FoV
iFoV
63° x 50°
3.333 mr
48° x 37°
2.778 mr
34° x 26°
1.923 mr
24° x 18°
1.316 mr
Min Focus Distance 2.5cm 3.2cm 7.6cm 15.3cm
Hyperfocal Distance 1.2m 2.1m 4.4m 9.5m
Hyperfocal Depth of Field 0.6m 1.1m 2.2m 4.8m
Lens Mount M24x0.5 inside thread; M29x1.0 outside thread
Length 8mm 9mm 13mm 19mm
Diameter 29mm 29mm 29mm 29mm
Weight 72g 72g <70g <70g

 

Narrow Field of View (NFOV) Models

25 mm
f/1.1

35 mm
f/1.2

50 mm
f/1.2

60 mm
f/1.25

100 mm
f/1.6

Tau 640
(17μ 640×512)
FoV
iFoV
25° x 20°
0.680 mr
18° x 14°
0.486 mr
12.4° x 9.9°
0.340 mr
10.4° x 8.3°
0.283 mr
6.2° x 5°
0.170 mr
Tau 336
(17μ 336×256)
FoV
iFoV
13° x 10°
0.680 mr
9.3° x 7.1°
0.486 mr
6.5° x 5°
0.340 mr
5.5° x 4.2°
0.283 mr
3.3° x 2.5°
0.170 mr
Tau 324
(25μ 324×256)
FoV
iFoV
18° x 14°
1.000 mr
13° x 10°
0.714 mr
9.1° x 6.9°
0.500 mr
7.6° x 5.7°
0.417 mr
4.6° x 3.7°
0.250 mr
Min Focus Distance 30cm 60cm 1.5m 2.3m 7m
Hyperfocal Distance 21m 35m 71m 122m 160m
Hyperfocal Depth of Field 11m 18m 36m 61m 80m
Lens Mount M34x0.5 inside thread.
Length 25mm 35mm 50mm 60mm 100mm
Diameter 42mm 42mm 58mm 61mm 82mm
Weight 112g 150g 280g 200g 479g

 

  1. Tau 336 & 324 analog video is upsampled & interpolated to 640 × 480 for NTSC, and to 640 × 512 for PALback

Applications

Learn more about how others are using the FLIR Tau camera core.

 

AeroVironment

AeroVironment's PumaThe Puma AE UAS uses a Tau 640. To learn more visit AVInc.com

 

Aeryon Scout

Aeryon ScoutThe Aeryon Scout sUAS uses a Tau2 640. To learn more visit Aeryon.com or check out sample imagery from the Scout

 

Cloud Cap

Cloud Cap's T2 GimbalThe TASE350 Gimbal uses a Tau 640. To learn more visit CloudCapTech.com

 

Nivisys

Nivisys ImageNivisys UTAM-32 Universal Thermal Monocular uses a Tau 324. To learn more visit Nivisys.com

 

UAVS Poland

ARS System GimbalThe ARS System gimbal designed for surveillance and security applications uses a Tau 640. Watch sample video or visit UAVS.eu to learn more

 

Draganfly

Draganfly ImageThe Draganflyer X6 UAV uses a Tau 324. To learn more visit Draganfly.com

 

Lockheed

Lockheed's Desert Hawk IIIThe Desert Hawk III UAS uses a Tau 640. To learn more visit LockheedMartin.com

 

Tuberculosis Free New Zealand

TB Free NZTB Free NZ is using a Tau2 25mm camera core in their UAVs. Watch the newscast to learn more TB Free NZ

 

Transformational Security

The TS-1 handheld thermal imager uses a Tau 640. To learn more visit PowerfulSecurity.com