Changchun Long Ze Precision Optics Co., Ltd.

  With the decline in vision of contemporary people, the use of optometry tools has become more and more common. The refractor examines the convergence of light after entering the eyeball and measures the degree of difference in vergence and dispersion between the examined eye and the emmetropic eye. The autorefractor used in modern times is usually an infrared phoropter. The optical components of the infrared phoropter include infrared collimating lasers,   optical lenses   with coating, optical filters, optical mirrors and optical prisms. The optical system of the phoropter is composed of a light source, a folding light path, a focusing light path, and an image acquisition and analysis light path. The light source generates a standard image, that is, an infrared aperture. It throws the image into the pupil of the human eyes. The folded light path puts the light emitted by the light source into the pupil of the human eyes, and transmits the reflected image of the fundus to the image a

  As a   Dome Lens Manufacturer , share with you. Variety is crucial in any photo combination. When displaying photos, the first thing we learn is that less is more; it is better to show 5 good photos than 25 mediocre photos. The next trick to presenting photos is to find those photos that make people scream "wow". This is done through diversity and let the audience look forward to your next visual surprise. Underwater Camera Dome Over- and under-lens, also called sub-lens, are very suitable for blending into your macro and wide-angle collection. The following are the basic techniques that can help you shoot under the split lens. 1. Use a large dome Whether it is short-term energy or long-term energy, the ocean surface can roll at most dive sites. Just like underwater wide-angle photography, a good sub-lens consists of several elements: a powerful top side scene, a powerful underwater scene, and a waterline across the screen. The larger the dome port, the larger the surface a

  Mirrors are most likely the most commonly used optical elements in your laboratory, as well as their quality, efficiency, and also integrity are crucial to the success of your experiment. That's why we provide a variety of mirrors so you can be assured to discover what you require. When selecting an Optical Mirror, bear in mind the reflectivity, laser damage resistance, and coating resilience. For fast delivery, all our mirrors are delivered from the supply. 1. Mirrors for optics. Optical lenses  have a smooth, highly-polished, aircraft, or curved surface for showing light. Typically, the mirroring surface area is a thin finish of silver or lightweight aluminum on the glass. Product specifications for optical mirrors consist of size, the radius of curvature, density focal length, and surface high quality. The diameter or elevation of an optical mirror is measured directly on. If the optical mirrors curvature was extrapolated right into a ball, after that the span of that sphere i

  The currency detector is an optoelectronic instrument for checking the authenticity of banknotes, involving many fields such as mechanics, electricity, optics   and magnetism. The counterfeit identification methods used by   currency detector s  are usually three methods: fluorescence detection, magnetic analysis and infrared penetration.  T he method  of  fluorescence detection uses filters to distinguish light and eliminates the interference  from  ambient light. Principle  of d etection Banknote  is  made of special paper. Counterfeit banknotes are usually made of bleached ordinary paper. The bleached paper will undergo a fluorescence reaction  to  ultraviolet light (blue light with a wavelength of 365 nm). Blue light  is  diffracted under the excitation of ultraviolet light   with a wavelength of 420-460nm . R eal banknotes have no fluorescence reaction. Fluorescence detection The first method is to irradiate the surface of banknotes with ultraviolet light and measure the intensi