Abstract: A laser pencil beam passes through a part of an interferometer and becomes two coherent laser pencil beams. These two laser pencil beams are aligned to pass a high magnification converging lens and become two diverging conic spherical waves. The beam coverage of these two diverging conic spherical waves becomes larger and larger as they travel. After a predetermined distance, the beam coverage of these two conic spherical waves could be as large as several meters. The conic spherical waves change their shapes and phases of wave fronts as they transmitted through (or reflected by) an optical object under test. By observing and analyzing the interference pattern of these two conic spherical waves, one can find out the quality of the object under test. This interferometer provides a way to test optical objects as large as several meters, as compare to several inches in diameter for the prior art interferometers.

Abstract: An optical mover with functions of nanometer fine adjustment and micrometer coarse adjustment is mainly used to align two optical elements for connecting two optical elements, such as connection of two optical fibers, connection of one optical fiber with a photo diode, or connection of one optical fiber and one optical waveguide. In using, one optical element is placed upon the supporting seat for fine position adjustment, and another optical element is fixed on an external retainer for aligning to the former optical element on the supporting seat. A coarse control button is firstly used to coarsely adjust the position of the former optical element to approximately align to the later optical element. Then a fine-adjusting button is used to fine adjust the position therebetween so as to well align the two optical elements to a desire level for further operation, such as connecting the two elements.

Abstract: An optical mover with functions of nanometer fine adjustment and micrometer coarse adjustment is mainly used to align two optical elements for connecting two optical elements, such as connection of two optical fibers, connection of one optical fiber with a photo diode, or connection of one optical fiber and one optical waveguide. In using, one optical element is placed upon the supporting seat for fine position adjustment, and another optical element is fixed on an external retainer for aligning to the former optical element on the supporting seat. A coarse control button is firstly used to coarsely adjust the position of the former optical element to approximately align to the later optical element. Then a fine-adjusting button is used to fine adjust the position therebetween so as to well align the two optical elements to a desire level for further operation, such as connecting the two elements.

Abstract: A high precision mirrormount comprises a retaining plate retaining reflecting mirror; an adjusting plate behind the retaining plate; a retaining ball fixed between the retaining plate and the adjusting plate; a fine-adjusting plate installed at the backside of the adjusting plate; a tension shaft fixed to the adjusting plate and exposing out of the fine-adjusting plate; tension springs being installed around the tension shaft; a first adjusting screw serving to coarsely adjust the adjusting plate to move closer or far away from the retaining plate; and a second adjusting screw having one end resisting against an elastic element which has an elastic coefficient of the elastic element being very smaller than those of the tension springs. Thus, the second adjusting screw has an effect of fine adjustment. In 2D case, two above structures are formed along an X axis and a Y axis respectively.

Abstract: A mechanical nanomover for optical elements alignment comprises a platform; a front supporting block and a rear supporting block; a left metal sheet and a right metal sheet installed between the two supporting blocks; a movable block installed between the two metal sheets; a weak spring and a strong spring which are interacted with the movable block. A translation stage serves to drive the weak spring to drive the movable block. The elastic coefficient of the strong spring is much greater than that of the weak spring so that the larger displacement of the weak spring will induce only a small displacement of the movable block due to the interaction of the strong spring. No electric power is needed to drive the structure of the nanomover. The mechanical nanometer can provide a sufficient precision to the operation, while it is very inexpensive.

Abstract: A high precision mirrormount comprises a retaining plate retaining reflecting mirror; an adjusting plate behind the retaining plate; a retaining ball fixed between the retaining plate and the adjusting plate; a fine-adjusting plate installed at the backside of the adjusting plate; a tension shaft fixed to the adjusting plate and exposing out of the fine-adjusting plate; tension springs being installed around the tension shaft; a first adjusting screw serving to coarsely adjust the adjusting plate to move closer or far away from the retaining plate; and a second adjusting screw having one end resisting against an elastic element which has an elastic coefficient of the elastic element being very smaller than those of the tension springs. Thus, the second adjusting screw has an effect of fine adjustment. In 2D case, two above structures are formed along an X axis and a Y axis respectively.

Abstract: A mechanical nanomover for optical elements alignment comprises a platform; a front supporting block and a rear supporting block; a left metal sheet and a right metal sheet installed between the two supporting blocks; a movable block installed between the two metal sheets; a weak spring and a strong spring which are interacted with the movable block. A translation stage serves to drive the weak spring to drive the movable block. The elastic coefficient of the strong spring is much greater than that of the weak spring so that the larger displacement of the weak spring will induce only a small displacement of the movable block due to the interaction of the strong spring. No electric power is needed to drive the structure of the nanomover. The mechanical nanometer can provide a sufficient precision to the operation, while it is very inexpensive.

Abstract: A high isolation gain flattening filter component includes the optical isolator with the built-in gain flattening filter (GFF) component which is disposed between the isolator core and one of the collimators wherein said isolator core includes a pair of birefringent crystals with therebetween a Faraday rotator together enclosed in a magnetic ring.