Uncooled IR detector array having improved temperature stability and reduced fixed pattern noise

An infrared imager array including a monolithic semiconductor integrated circuit substrate for providing an image signal of a scene, comprising:

• a first plurality of infrared sensors arranged in rows and columns each one of the plurality of infrared sensors having a deflectable microelectromechanical infrared radiation responsive element, for providing a proportionate electrical signal in response to infrared radiation of the scene incident thereto;
• a second plurality of blind infrared sensors positioned along at least one side perimeter of the rows and columns, each one of the second plurality of infrared sensors having a deflectable micro-electromechanical infrared radiation responsive element, the infrared radiation responsive elements of the second plurality of blind infrared sensors being shielded from infrared radiation of the scene for providing a proportionate electrical signal in response to infrared radiation incident thereto,
• wherein a temperature gradient generated along the at least one side perimeter is sensed and converted to electrical signals by the second plurality of blind infrared sensors.