The states of plural image output apparatuses are sensed. The computer first detects all image edges that are present in the image. The second housing has a second insulator and a second shell shielding the second insulator. Method for the correction of Pectus Carinatum using said apparatus in order to achieve a normal anatomic shape of the chest wall. The trouble detecting unit includes an analog amount converting unit to convert clock pulses from the control unit to an analog amount and an analog amount comparing unit to compare the analog amount generated in the analog amount converting unit with a predetermined threshold. The aim of the invention is to provide a method that allows a simple and cost-effective production of such an optical component from quartz glass.