US Patent 7324733 Frameless hollow roof mirror and method of manufacture

The present invention relates to optical components for reversing and inverting images, and to methods of manufacturing them accurately, robustly and cost-effectively. The method includes optical contact bonding a first optical element and a second optical element and adhesively bonding the first optical element and the second optical element. Adhesively bonding might include forming a notch into the second optical element and depositing a bead of adhesive into the notch, such that the adhesive adheres to both the notch and the first optical element.