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Theia ML183M 超宽变焦距镜头Theia ML183M Ultra wide varifocal lens: SL183/ML183
忒西亚的SL183A SL183M（CS安装）和ML183M（C座）透镜提供了超宽视场而不失真。这些是变焦距透镜，允许用户从广角到超宽优化视场。镜片包括专利线性光学技术®，它允许超宽视场没有桶扭曲，不像其他广角镜头不包括忒西亚的技术。这种直线设计允许在图像边缘增加分辨率，从而增加检测的概率。
SL183A SL183M和ML183M透镜技术条件
查看广角图像实例
Theia's SL183 (CS mount) and ML183 (C mount) lenses provide ultra wide field of view without distortion. These are varifocal lenses allowing the user to optimize the field of view from wide angle to ultra wide. The lenses incorporate patented Linear Optical Technology® which allows an ultra wide field of view without barrel distortion unlike other wide angle lenses not including Theia's technology. This rectilinear design allows increased resolution at the edges of the image thus increasing the probability of detection.
Technical specifications for SL183 and ML183 lenses
View the example wide angle images
| SL183A | ML183A | SL183M | ML183M | |
| Iris type | DC autoiris | Manual iris | ||
| Focal length | 1.8mm - 3mm using Linear Optical Technology® | |||
| F/# | F/1.8 to closed | |||
| Resolution | up to 5 megapixel | |||
| IR correction | Yes | |||
| Mount type | CS-mount | C-mount | CS-mount | C-mount |
类似于Theia的其他镜头，SL183A SL183M和ML183M是高质量的镜头，以允许安装者充分利用高清和多像素相机的高分辨率。镜头可以用在多达五百万像素分辨率的相机上，从边缘到边缘提供清晰的图像。
此外，SL183/ML183系列还包括EasyZoMμ，它允许安装者对镜头进行一次聚焦，然后调整缩放或放大倍数，以获得优化的视场。缩放后只需要小的焦点优化。不需要其他变焦透镜所需的迭代聚焦焦距聚焦方法。
该镜头是红外校正与真实的昼夜相机使用。该IR校正将来自人工照明的IR光聚焦在与可见光相同的平面上，从而允许当白天/夜晚相机切换到夜间模式时图像保持焦点。与没有红外校正的透镜不同，当使用红外照明时，夜间图像不会失去焦点。
Similar to Theia's other lenses, the SL183 and ML183 are high quality lenses designed to allow the installer to take full advantage of the high resolution of HD and multi megapixel cameras. The lens can be used on cameras up to five megapixel resolution giving a crisp image from edge to edge.
In addition, the SL183/ML183 series includes EasyZoom™ which allows the installer to focus the lens once and then adjust zoom or magnification to give the optimized field of view. Only minor focus optimization is required after zooming. There is no need for the iterative focus-zoom-focus method of setup required for other varifocal lenses.
The lens is IR corrected for use with true Day/Night cameras. This IR correction focuses IR light from artificial illumination at the same plane as the visible light allowing the image to remain in focus when the Day/Night camera switches to night mode. Unlike lenses without IR correction, the night image will not be out of focus when using IR illumination.
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