Access for Office 365 Access 2019 Access 2016 Access 2013 Access 2010 Access 2007This article has information about the limits of Microsoft Access database files and objects. In most cases when a database exceeds the following limits it might be an indication of a design issue. Using the information in this article and a careful examination of your database design might help you locate what needs to be corrected for successful implementation. For example, importing data directly from Microsoft Excel into Access without normalization can result in creation of additional fields (columns). If you’d like information about designing databases or normalization, take a look at the resources in the section.
In this articleDatabase specificationsThe following list of tables applies to Access databases. Specific version differences, if any, are called out individually. GeneralAttributeMaximumTotal size for an Access database (.accdb or.mdb), including all database objects and data2 gigabytes, minus the space needed for system objects.
The lens has an effective focal length of 4.483 mm, a F-number of 2.50, a field-of-view (FOV) of 76.2 degree, and a total length of 5.873 mm. The maximum distortion of the lens is less than 2.0%. The minimum value of all field relative illumination is over 39.8%. Learn how to understand focal length and field of view for imaging lenses through. Which can limit their usability, as discussed in Sensor Relative Illumination. Either a Fixed Magnification Lens or computer simulations (e.g. Zemax) with the.
Field as discrete sample pointThe field specified in the field data window represents discrete sampling points on the two dimensional object surface. The default merit function will minimize the root mean squared (RMS) of the criteria (spot size, wavefront, MTF etc.) across all fields. Normally, the defined field points will include at least the on-axis and the maximum field points. Because the performance in-between the on-axis and max field can change, we often need to specify intermediate field points. Since we are sampling 2D object surface, and not 1D object line, it make sense to specify the intermediate sample points such that equal areas (not equal distances) on the object surface are sampled. The intermediate field point, if 3 fields are specified, will not be at the half point between the on-axis and the max field when sampling equal areas (see picture below).
Note that the sample system below is rotationally symmetric and we only need to sample the field along one radial arm.From simple geometry, the field values when dividing into n rings of equal areas are:where 'n' is number of field points and HFOV (Half Field of View) is the radial max field.If n = 3 then the intermediate field point is 1/root(2) times the max field as shown below.The number of intermediate field points need not be large for most systems since the performance don't often change too quickly as function of field. A sensible approach is to define only one or two intermediate fields, optimize and then evaluate the performance as function of continuous fields (using analysis such as RMS vs. Field) to determine if addition fields are needed.