Defence-tech start-up Tonbo has secured ₹175 crore in a Series D funding round.The new funds will be utilized to accelerate the development of next-generation infrared sensors and high-power microwave technologies.Tonbo Imaging aims to expand its global presence and deliver advanced battlefield intelligence and protection systems.Tonbo's technology is already deployed by defence forces in over 30 countries, including IDF, US Navy SEALs, and Indian MoD.