The LEOK-7 Laser Optical Demonstration Instrument is developed for light and optics education at universities and colleges. It provides a complete set of optical and mechanical components as well as light sources. A He-Ne laser beam diverges into a sector shape after passing through a cylindrical lens, and projects onto an viewing screen. By inserting proper optical components into the optical path, numerous geometric- and physical-optics experiments can be demonstrated. No darkroom is needed. Below is a list of 64 experiment examples: 1.Straight line propagation of light ray 2.Independent propagation of light ray 3.Reflection law of light 4.Beam expansion by using positive and negative lenses 5.Beam expansion by using a cylindrical lens 6.Beam splitting by using a beam splitter 7.Beam splitting by using a grating 8.Light reflection from the interface of two media 9.Form real image from convergent rays by a flat mirror 10.Form virtual image from divergent rays by a flat mirror 11.Relation of angle change between reflected rays & mirror 12.Imaging property of dual flat mirrors 13.Disfuse reflection of light 14.Light refraction, refraction law and reversibility 15.Total reflection and critical angle 16.Applications of total reflection 17.Principle of periscope 18.Minimum defection angle & measuring refractive index 19.Measuring shift of light passing through a plate 20.Principle of fiber light guide 21.Measuring focal point & focal length of a concave mirror 22.Rays passing the spherical center of the concave mirror 23.Imaging of object distance larger than two focal length 24.Imaging of object distance between 1-2 focal length 25.Imaging of object locating on focal plane 26.Imaging of object locating within one focal length 27.Rays diverging of a convex mirror & measuring focal length 28.Rays passing the spherical center of the convex mirror 29.Imaging property of a convex mirror 30.Rays passing through the nodal point of a lens 31.Demo the focal point in object space of a lens 32.Measuring focal length of a convex lens 33.Imaging principle of a camera 34.Imaging principle of a -1x inverting system 35.Principle of a projector 36.Principle of a parallel beam tube 37.Imaging principle of a magnifier 38.Virtual image locating within focal length 39.Virtual image locating on focal plane 40.Virtual image locating at 2x focal length 41.Virtual image locating beyond 2x -focal length 42.Virtual image locating at infinite distance 43.Measuring focal length of a negative lens 44.Real object imaged through a prism 45.Principle of a Kepler telescope 46.Imaging of an object by Kepler telescope 47.Principle of a Galileo telescope 48.Imaging of an object by Galileo telescope 49.Principle of a microscope 50.Correction principle of a myopic eye 51.Correction principle of presbyopia 52.Young's double-slit interference 53.Interference through a wedge 54.Diffraction of a single slit 55.Diffraction of double-slit 56.Diffraction of triple-slit 57.Diffraction of tetrad-slit 58.Diffraction of a grating 59.Diffraction of a circular aperture 60.Diffraction of a square aperture 61.Diffraction of a rectangular aperture 62.Diffraction of a triangular aperture 63.Generating and checking polarization 64.Newton's ring