The present disclosure provides for articles that can exhibit structural colors through the use of an optical stack and a cover release layer, where the cover release layer is disposed on an externally (or outwardly) facing surface of the optical stack. The optical stack can be disposed on a substrate, which can be disposed on a surface of an article or the optical stack can be disposed on a surface of the article. The cover release layer can be disposed on the optical stack on the side opposite the substrate or article surface so it is on the externally facing surface and can be viewed by an observer. When exposed to visible light, the optical stack imparts a structural color, where the structural color is visible color produced, at least in part, through optical effects (e.g., through scattering, refraction, reflection, interference, and/or diffraction of visible wavelengths of light). The structural color can have a single color or be multicolor, including iridescent. The cover release layer is disposed over (e.g., at least portions) of the optical stack so that the structural color is not present since it is not exposed to light, but when the cover release layer is removed, the optical stack can impart structural color. The cover release layer can be removed by abrasion (e.g., intentional or unintentional), where the abrasion can be applied to the cover release layer that causes separation of the cover release layer from the optical stack.

An LED light source capable of projecting a set graphic logo and red dot sight thereof, comprising a point light source (1) and a peripheral light source (2) around the point light source (1), the peripheral light source (2) being discontinuous line light source. The LED light source capable of projecting the set graphic logo does not need a raster being matched with transmission to obtain an LED with luminous set graphic logo, so that the power consumption is reduced, system design is simplified, product functions are increased, and simplification of structure, convenience of operation and reduction of cost for red dot sight are facilitated.

In general, techniques are described for a personal protective equipment (PPE) management system (PPEMS) that uses images of optical patterns embodied on articles of personal protective equipment (PPEs) to identify safety conditions that correspond to usage of the PPEs. In one example, an article of personal protective equipment (PPE) includes a first optical pattern embodied on a surface of the article of PPE; a second optical pattern embodied on the surface of the article of PPE, wherein a spatial relation between the first optical pattern and the second optical pattern is indicative of an operational status of the article of PPE.

An optical sight includes a lens assembly, a digital reticle display, a magnification adjuster, and a controller. The magnification adjuster is configured to be adjusted by a user. The controller is configured to display a reticle on the digital reticle display based on a real-time magnification, and is configured to determine the real-time magnification based on a position of the magnification adjuster.

A multifunctional rangefinder capable of functioning as a rangefinder and at least one additional function. The multifunctional rangefinder comprises a laser transmitter for transmitting a laser pulse and an object lens, located at an inlet of the multifunctional rangefinder, for capturing light reflected by a target and focusing the reflected light at a first digital micro-mirror device. The first digital micro-mirror device has a plurality of micro-mirrors, and each of the plurality of micro-mirrors has an “on” position and an “off” position. A single detector element receives light reflected by the plurality of micro-mirrors of the first digital micro-mirror device. An optical condenser arrangement is located between the digital micro-mirror device and the detector element. An analog/digital converter is coupled to the single detector element for processing signals detected by the single detector element. A grating, a second digital micro-mirror device, first and second collimating lens are also provided.

A multifunctional rangefinder capable of functioning as a rangefinder and at least one additional function. The multifunctional rangefinder comprises a laser transmitter for transmitting a laser pulse and an object lens, located at an inlet of the multifunctional rangefinder, for capturing light reflected by a target and focusing the reflected light at a first digital micro-mirror device. The first digital micro-mirror device has a plurality of micro-mirrors, and each of the plurality of micro-mirrors has an “on” position and an “off” position. A single detector element receives light reflected by the plurality of micro-mirrors of the first digital micro-mirror device. An optical condenser arrangement is located between the digital micro-mirror device and the detector element. An analog/digital converter is coupled to the single detector element for processing signals detected by the single detector element. A grating, a second digital micro-mirror device, first and second collimating lens are also provided.

A microscope for examining a specimen configured to receive a first light source or a second light source. The first light source being configured to emit a first output light through a first pupil, and the second light source being configured to emit a second output light through a second pupil that is different than the first pupil. The microscope comprises a frame, a source objective, and first and second optical assemblies. The first and second optical assemblies are removably connectable to the frame. The first optical assembly comprises a first set of optical elements that are configured to pass the first output light to an imaging pupil of the source objective, and the second optical assembly comprises a second set of optical elements configured to pass the second output light to the imaging pupil.

The invention relates firstly to a method for determining a mechanical deviation on a displacement path of an optical zoom lens, in particular on a displacement path of an optical zoom lens of a microscope. The optical zoom lens is arranged in a beam path between an object to be recorded and an electronic image sensor. In a first method step, an optical marker is introduced into the beam path at a position of the beam path located between the object to be recorded and the optical zoom lens, such that the optical marker passes the optical zoom lens and then is depicted on an image in which

a position of the optical marker is detected and determined. This is compared with a reference position of the optical marker in order to determine the mechanical deviation on the displacement path of the optical zoom lens. The invention further relates to a method for correction of a displacement error of an image recorded by an electronic image sensor and to an electronic image recording device.

The invention relates firstly to a method for determining a mechanical deviation on a displacement path of an optical zoom lens, in particular on a displacement path of an optical zoom lens of a microscope. The optical zoom lens is arranged in a beam path between an object to be recorded and an electronic image sensor. In a first method step, an optical marker is introduced into the beam path at a position of the beam path located between the object to be recorded and the optical zoom lens, such that the optical marker passes the optical zoom lens and then is depicted on an image in which

a position of the optical marker is detected and determined. This is compared with a reference position of the optical marker in order to determine the mechanical deviation on the displacement path of the optical zoom lens. The invention further relates to a method for correction of a displacement error of an image recorded by an electronic image sensor and to an electronic image recording device.

A computer-implemented system and method for template-based imaging are disclosed. A first image of a first slide, a second image of a second slide, and a third image of a third slide are received, wherein the third image includes a representation of a sample disposed on the third slide. Values of pixels of a template image that are associated with a plurality of features common to the first and second slides and represented in the first and second images are set to a non-background value and values of pixels of the template image not associated with the plurality of features are set to a background value. An offset between the template image and the third image is developed and coordinates of pixels in the third image that are associated with the representation of the sample are determined in accordance with the offset.