Abstract: A meniscus tear assisted determination system includes an image capturing device and a processor. The image capturing device is for capturing a target protocol of a subject, and the target protocol includes a plurality of target knee joint image sequences. The processor is signally connected to the image capturing device and includes a data preprocessing module and a meniscus tear assisted determination program. The data preprocessing module is for grouping the plurality of target knee joint image sequences and extracting a plurality of target coronal plane image sequences and a plurality of target sagittal plane image sequences. The meniscus tear assisted determination program includes a meniscus location detector and a meniscus tear predictor.

Abstract: A light tunnel for use in an optical projection system, comprising: a plurality of reflecting plates, each said reflecting plate being disposed between and connected to the other two said reflecting plates, so that a light passage with a hollow structure is defined by said plurality of reflecting plates. At least one of said reflecting plates has a first surface in an inclined structure, said reflecting plate having said first surface is disposed between and obliquely connected to the other two said reflecting plates for forming said light passage having a non-rectangular cross section, and said first surface of said reflecting plate is abutted against an adjoined reflecting plate to form a junction with no gap between said first surface of said reflecting plate and said adjoined reflecting plate.

Abstract: A light tunnel for use in an optical projection system, comprising: a plurality of reflecting plates, each said reflecting plate being disposed between and connected to the other two said reflecting plates, so that a light passage with a hollow structure is defined by said plurality of reflecting plates. At least one of said reflecting plates has a first surface in an inclined structure, said reflecting plate having said first surface is disposed between and obliquely connected to the other two said reflecting plates for forming said light passage having a non-rectangular cross section, and said first surface of said reflecting plate is abutted against an adjoined reflecting plate to form a junction with no gap between said first surface of said reflecting plate and said adjoined reflecting plate.