FLIR is pleased to announce today the launch of Lepton 3.5, a new member of the Lepton family that adds both radiometry and an enhanced scene dynamic range.  The addition of radiometry and a temp range from -10 to 400° means your makes can accurately read temperatures in a much wider range of applications.  Ready to jump in and buy one?  Get it here.

Lepton 3.5 overview

The FLIR Lepton® is a radiometric-capable LWIR camera solution that is smaller than a dime, fits inside a smartphone, and is one tenth the cost of traditional IR cameras. Using focal plane arrays of either 160×120 or 80×60 active pixels, Lepton easily integrates into native mobile-devices and other electronics as an IR sensor or thermal imager. The radiometric Lepton captures accurate, calibrated, and noncontact temperature data in every pixel of each image.


Effective Frame Rate
8.7 Hz (commercial application exportable)
Input Clock
25-MHz nominal, CMOS IO Voltage Levels
Output Format
User-selectable 14-bit, 8-bit (AGC applied), or 24-bit RGB (AGC and colorization applied)
Pixel Size
12 µm
Scene Dynamic Range
Low Gain Mode: -10 to 400°C; High Gain Mode: -10 to 140°C
Spectral Range
Longwave infrared, 8 µm to 14 µm
Temperature Compensation
Automatic. Output image independent of camera temperature.
Thermal Sensitivity
<50 mK (0.050° C)
Connections & Communications
Video Data Interface
Video over SPI
Electrical & Mechanical
Control Port
CCI (I2C-like), CMOS IO Voltage Levels
Package Dimensions - Socket Version (w x l x h)
10.50 × 12.7 × 7.14 mm
Mechanical Interface
32–pin socket interface to standard Molex® socket
Environmental & Approvals
Non-Operating Temperature Range
-40 °C to +80 °C
Optimum Temperature Range
-10 °C to +80 °C
1500 G @ 0.4 ms
Imaging & Optical
Array format
160 x 120, progressive scan
FOV - Diagonal
FOV - Horizontal
57° (nominal)
Image Optimization
Factory configured and fully automated
Non-Uniformity Correction (NUC)
Sensor Technology
Uncooled VOx microbolometer
Solar protection
Input Supply Voltage
2.8 V, 1.2 V, 2.5 V to 3.1 V IO
Power Dissipation
150 mW (operating), 650 mW (during shutter event), 5 mW (standby)