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For instance, a boolean class type.

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For example, it is possible to have a good spot diagram even if there is more warfront error than desired. And sometimes you may make the spot diagram look better without really improving the images. So, it can be useful to check other analysis windows to double check the spot diagram. Another good tool is the Strehl ratio, which I will explain later on this page. The above image has 15 spot diagrams. The top row shows the spot diagrams for an off axis image which is 2 degrees away from the center.

The bottom row shows the spot diagram for images on the axis. The columns show a focus shift. This means that the column on the left is 0. The column on the right is 0. The center column is at the current focus. You can examine the spot diagram at any focal position you want. For visual use a lens is normally focused for the primary wavelength because our eyes are very sensitive to green light, and less sensitive to blue and red light.

But, you might want to examine a lens which is focused for polychromatic light, which would be a balance of all three wavelengths. The diagram supplied is of low visual quality - some of the information needed to understand what is being seen is very hard to see. Also, the context is not absolutely certain. A link or reference to the original would be useful. By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service , privacy policy and cookie policy , and that your continued use of the website is subject to these policies.

Home Questions Tags Users Unanswered. How to read a lens spot diagram? Raphael Raphael 58 1 5. It looks like you cross posted this here, and have already received some answers over at the Physics site: I voted to close as a duplicate of the physics question but regret that after seeing the great answer posted here by Russell McMahon.

See Wikipedia - Airy Disk Outside the Airy disk you see light which has been diverted due to various aberrations. He comments - Spot diagrams are graphs that show where rays from a point object will fall on the image surface they must fall close together if the lens is to form a good image. Thank you very much! Sign up or log in Sign up using Google. The element s dependent on the supplier element s.

In some cases such as a Trace Abstraction the assignment of direction that is, the designation of the client element is at the discretion of the modeler, and is a stipulation. Determines where the abstraction relationship appears within different namespaces within the overall model, and its accessibility. A composition of an Expression that states the abstraction relationship between the supplier and the client. In some cases, such as Derivation, it is usually formal and unidirectional.

In other cases, such as Trace, it is usually informal and bidirectional. The mapping expression is optional and may be omitted if the precise relationship between the elements is not specified.

Description of abstraction relationship. An element import is defined as a directed relationship between an importing namespace and a packageable element. The name of the packageable element or its alias is to be added to the namespace of the importing namespace. It is also possible to control whether the imported element can be further imported. An element import is shown using a dashed arrow with an open arrowhead from the importing namespace to the imported element.

The name of access relationship. Specifies the visibility of the imported PackageableElement within the importing Package. The default visibility is the same as that of the imported element. If the imported element does not have a visibility, it is possible to add visibility to the element import. Default value is public. Description of access relationship.

A kind of association that has one of its end marked shared as kind of aggregation, meaning that it has a shared aggregation. The name of aggregation. Determines where the aggregation appears within different namespaces within the overall model, and its accessibility. The source of aggregation. The target of aggregation. If true, the aggregation does not provide a complete declaration and can typically not be instantiated.

An abstract aggregation is intended to be used by other aggregations. Indicates whether it is possible to further specialize an aggregation.

If the value is true, then it is not possible to further specialize the aggregation. Specifies whether the aggregation is derived from other model elements such as other aggregations or constraints. An association specifies a semantic relationship that can occur between typed instances. It has at least two ends represented by properties, each of which is connected to the type of the end.

More than one end of the association may have the same type. An end property of an association that is owned by an end class or that is a navigable owned end of the association indicates that the association is navigable from the opposite ends; otherwise, the association is not navigable from the opposite ends.

The name of association. Determines where the association appears within different namespaces within the overall model, and its accessibility. The source of association. The target of association. If true, the association does not provide a complete declaration and can typically not be instantiated. An abstract association is intended to be used by other associations. Indicates whether it is possible to further specialize an association.

If the value is true, then it is not possible to further specialize the association. Specifies whether the association is derived from other model elements such as other associations or constraints.

A model element that has both association and class properties. An AssociationClass can be seen as an association that also has class properties, or as a class that also has association properties.

It not only connects a set of classifiers but also defines a set of features that belong to the relationship itself and not to any of the classifiers. The name of association class. The source classifier the association class connecting to. The target classifier the association class connecting to. Determines where the association class appears within different namespaces within the overall model, and its accessibility.

Description of association class. TemplateBinding is a directed relationship from a bound templateable element to the template signature of the target template. A TemplateBinding owns a set of template parameter substitutions. The name of binding relationship.

Determines where the binding relationship appears within different namespaces within the overall model, and its accessibility. A composition of an Expression that states the binding relationship between the supplier and the client. Description of binding relationship. A class describes a set of objects that share the same specifications of features, constraints, and semantics. Class is a kind of classifier whose features are attributes and operations.

Attributes of a class are represented by instances of Property that are owned by the class. Some of these attributes may represent the navigable ends of binary associations.

The model element that owns the class. Determines where the class appears within different namespaces within the overall model, and its accessibility. If true, the class does not provide a complete declaration and can typically not be instantiated. An abstract class is intended to be used by other classes.

Indicates whether it is possible to further specialize a class. If the value is true, then it is not possible to further specialize the class. Indicates whether the class has no ancestors. Determines whether an object specified by this class is active or not.

If true, then the owning class is referred to as an active class. If false, then such a class is referred to as a passive class. Set it to make the class become a "business class".

Refers to all of the Properties that are direct i. An operation is a behavioral feature of a class that specifies the name, type, parameters, and constraints for invoking an associated behavior.

Operations here refers to the operations owned by the class. A TemplateableElement that has a template signature is a specification of a template. A template is a parameterized element that can be used to generate other model elements using TemplateBinding relationships.

The template parameters for the template signature specify the formal parameters that will be substituted by actual parameters or the default in a binding. A template parameter is defined in the namespace of the template, but the template parameter represents a model element that is defined in the context of the binding. A templateable element can be bound to other templates.

This is represented by the bound element having bindings to the template signatures of the target templates. In a canonical model a bound element does not explicitly contain the model elements implied by expanding the templates it binds to, since those expansions are regarded as derived. The semantics and well-formedness rules for the bound element must be evaluated as if the bindings were expanded with the substitutions of actual elements for formal parameters.

Properties of class in implementation code level. Settings in this page is programming language specific, and will affect the code being generated. A Java annotation is a metadata that can be added to Java source code for annotation purposes. A form of class that act as a container of enumeration literals. For instance, an enumeration Color holds enumeration literials red, gree and blue. An interface is a kind of classifier that represents a declaration of a set of coherent public features and obligations.

An interface specifies a contract; any instance of a classifier that realizes the interface must fulfill that contract. The obligations that may be associated with an interface are in the form of various kinds of constraints such as pre- and postconditions or protocol specifications, which may impose ordering restrictions on interactions through the interface.

Since interfaces are declarations, they are not instantiable. Instead, an interface specification is implemented by an instance of an instantiable classifier, which means that the instantiable classifier presents a public facade that conforms to the interface specification.

Note that a given classifier may implement more than one interface and that an interface may be implemented by a number of different classifiers. The name of interface. The model element that owns the interface. Determines where the interface appears within different namespaces within the overall model, and its accessibility. A form of class that represents a predefined data type.

For instance, a boolean class type. A special form of class that can be used to model an object model of a relational database. Settings that affects the ORM code being generated from object model. Business key is made for generating equals and hasCode operations in ORM code. A special form of class that captures common attributes of sub-ORM-Persistable classes. A user type class defines an object type for object mode that can be access in generated ORM code, and persist in database as a column instead of an entity.

An ORM Parameterized type provides you with opportunity to enforce the correctness of data by implementing correctness checking in generated ORM code. A special form of class for modeling EJB entity bean.

A collaboration is represented as a kind of classifier and defines a set of cooperating entities to be played by instances its roles , as well as a set of connectors that define communication paths between the participating instances. The cooperating entities are the properties of the collaboration. A collaboration specifies a view or projection of a set of cooperating classifiers.

It describes the required links between instances that play the roles of the collaboration, as well as the features required of the classifiers that specify the participating instances.

Several collaborations may describe different projections of the same set of classifiers. The name of collaboration. Determines where the collaboration appears within different namespaces within the overall model, and its accessibility.

If true, the collaboration does not provide a complete declaration and can typically not be instantiated. An abstract collaboration is intended to be used by other collaborations. Indicates whether it is possible to further specialize a collaboration.

If the value is true, then it is not possible to further specialize the collaboration. Indicates whether the collaboration has no ancestors.

The children of collaboration.





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