Laminate windows for infrared sensing systems

A window for a sensing system comprising:

• a first glass ply comprising a first major surface, a second major surface that is opposite the first major surface, and a first thickness extending between the first major surface and the second major surface;
• a second glass ply comprising a third major surface, a fourth major surface that is opposite the third major surface, and a second thickness extending between the third major surface and the fourth major surface;
• an interlayer disposed between the first glass ply and the second glass ply and bonding the second major surface to the third major surface;
• and one or more layered films disposed on at least one of the first major surface and the fourth major surface, each of the one or more layered films comprising alternating layers of one or more higher refractive index materials and one or more lower refractive index materials, wherein:
• the first glass ply, the second glass ply, and the interlayer, in combination, without the one or more layered films, comprise an average transmittance of greater than 90% over a 50 nm wavelength range of interest,
• the 50 nm wavelength range of interest is contained in a wavelength range of 800 nm to 1800 nm,
• the alternating layers of the one or more layered films are configured such that the window exhibits an average transmittance of greater than or equal to 95% over the 50 nm wavelength range of interest for light normally incident on the first major surface or the fourth major surface,
• the alternating layers of the one or more layered films are configured such that the window exhibits an average reflectance of less than or equal to 5% over the 50 nm wavelength range of interest for light normally incident on the first major surface or the fourth major surface,
• the first thickness is at least two times greater than the second thickness, and
• the second glass ply is strengthened to a greater extent than the first glass ply such that the second glass ply exhibits a central tension in a central region thereof that is greater than that of the first glass ply.