Office buildings are workplaces where employees spend a significant amount of time, but they often lack daylight. Companies also work at night, so it is necessary to use artificial light sources. Electrical lighting should be adapted to the prevailing conditions and the type of work performed.

How islight intensitymeasured

For office work, where tasks are performed mainly at a PC, it is necessary to ensure that the light falling on the work surface is at least 500 lx. However, in places where computer equipment is used occasionally, the ligh intensity should be at least 300 lx. The table below also shows other examples of activities performed in office work and the respective light intensity required.

Sensor format refers to the physical size of the sensor, but is not dependent on the pixel size. This specification is used to determine what lens the camera is compatible with. In order for a lens to be compatible with a camera, the format of the lens needs to be greater than or equal to the sensor format. If a lens with a smaller format is use, the image experiences vignetting; this causes regions of the sensor outside of the lens format area to be dark.

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What the light intensity in the office should be can be determined based on current guidelines and regulations. Workplace lighting should meet at least the minimum requirements, so it is recommended to perform the illumination measurements before and after the upgrade.

Proper lighting of workstations is defined in PN-EN 12464 1. This standard sets out the minimum illumination levels for each activity performed indoors. Moreover, its provisions refer to the required uniformity of lighting and the glare rate at workstations.

Sensor size refers to the physical size of the sensor, and is typically not noted on specification sheets. The best way to determine sensor size is to look at the pixel size on the sensor and multiply by the resolution.

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Every workplace should be properly illuminated and, given the tasks to be performed, the light intensity in the office is particularly important. Proper lighting has a positive effect on employees and increases their efficiency. This can be achieved by using energy-efficient solutions, such as LED luminaires.

Follow two main steps to pick the minimum required camera resolution and to determine the correct focal length for your application.

Note: Lenses with short focal lengths (less than 12 mm) produce images with a significant amount of distortion. If your application is sensitive to image distortion, try to increase the working distance and use a lens with a higher focal length. If you cannot change the working distance, you are somewhat limited in choosing a lens.

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Providing adequate lighting at workstations has many benefits. Daylight contributes to a sense of well-being. A neutral colour of light has a positive effect on concentration, with 4000 K being recommended. On the other hand, the intensity of light adjusted to the work performed increases the efficiency of employees. Therefore, it is reasonable to think about the appropriate use of scientific achievements, such as LED luminaires and the relevant control, so that energy efficiency is combined with productivity.

It is also worth taking into account other parameters determining the source of light that can have a negative impact on the comfort of the performed work. It is about the flicker effect, CRI and UGR coefficient, as well as the light colour. These are most often to blame for headaches, bad moods and employee fatigue. Therefore, it is advisable to invest in workstation lighting, where brand-name power supplies are used and the colour rendering is appropriately high.

Generally, lenses have fixed focal lengths. Also, it is common that the working distance is flexible, so for simple calculations start out with a ratio of working distance to focal length. This will allow you to use specific lens focal lengths to determine the working distance needed. If the working distance is limited, then, by inverting this ratio, we get the ratio of focal length to working distance. This will allow you to use a range of working distance options to get a focal length range. Then once a lens is selected you can recalculate the exact working distance needed.

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Activities involving work at a PC and with documents require great focus. They cause considerable strain on the eyes of workers, so the workplace lighting affects their effectiveness. High contrasts between the work area and the surroundings are not conducive to such work. To this end, general lighting with the appropriate intensity should be provided. It should comply with the relevant standards as well.

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The resolution of an image is the number of pixels in the image. This is in two dimensions; for example 640X480. The calculations can be done for each dimension separately; but, for simplicity, this is often reduced to one dimension.

If you are considering an upgrade in your office areas email us! Our desingers will select the appropriate light sources for the work.

To make an accurate measurement on the image, you need to use a minimum of two pixels per smallest feature that you want to detect. To do the calculation for the minimum sensor resolution, multiply two (pixels/smallest feature) times the size (in real-world units) of the field of view divided by the size of the smallest feature as shown in the following equation:

Lenses are manufactured with a limited number of standard focal lengths. Common lens focal lengths include 6 mm, 8 mm, 12.5 mm, 25 mm, and 50 mm. Once you choose a lens whose focal length is closest to the focal length required by your imaging system, you need to adjust the working distance to get the object under inspection in focus.