Non-refrigeration thermal infrared imager capable of switching view fields

Abstract

The invention discloses a non-refrigeration thermal infrared imager capable of switching view fields. The non-refrigeration thermal infrared imager comprises a front fixed lens, a rear fixed lens, a movable lens, a control circuit and a non-refrigeration detector. The non-refrigeration thermal infrared imager is characterized in that a stepping motor is arranged on the periphery of the movable lens, the two sides of the movable lens are provided with a front limiting switch and a rear limiting switch, and the positions of the limiting switches meet the conditions that when the movable lens moves to the wide angle state, the state of the front limiting switch changes; when the movable lens moves to the long-focus state, the state of the rear limiting switch changes; when the control circuit drives the movable lens to move through a pulse signal with the frequency being f0, the control circuit drives the stepping motor through a pulse signal with the frequency lower than f0/2 to conduct the focusing motion in the focusing process in the wide-angle and long-focus state. According to the non-refrigeration thermal infrared imager, a suspicious object is observed and searched for within the large range under the wide view field, the suspicious object is locked, recognized and tracked under the narrow view field, and meanwhile the cost is reduced.

Description

technical field [0001] The present invention relates to an uncooled infrared thermal imager with a switchable field of view, and more specifically, to an uncooled infrared thermal imager with a switchable field of view that can quickly realize field of view switching and fine focus adjustment. Background technique [0002] With the development of the manufacturing level of uncooled thermal imaging detectors, the application of uncooled thermal imaging cameras in schools, communities, workshops, oilfield waterways, border defense and coastal defense is becoming more and more extensive. Thermal imagers with a single field of view have been difficult to meet the needs of specific customers, while continuous zoom thermal imagers are relatively expensive due to structural reasons, thermal imagers that can switch between wide and narrow fields of view have become an alternative Select, the wide field of view can be used for large-scale observation and search for suspicious targets...

AI Technical Summary

Problems solved by technology

Thermal imagers with a single field of view have been difficult to meet the needs of specific customers, while continuous zoom thermal imagers are relatively expensive due to structural reasons, thermal imagers that can switch between wide and narrow fields of view have become an alternative Choice, wide field of view can be used for large-scale observation and search for suspicious targets, and narrow field of view can be used for locking, identifying and tracking suspicious targets

Images