Provided are examples of light modulators and optical apparatuses that may include the light modulators. A road shape recognition device 1 detects a road region of the road based on an image capturing a scene ahead in the travel direction of the vehicle, and estimates the shape of the road based on that road region. The characteristic curves may be developed and transferred to the intelligent electronic device or may be developed by the intelligent electronic device through self-testing. 5 microns to capture and neutralize SOx, NOx, and toxic chemicals.