stella.util

Class MirrorCenter

java.lang.Object

util.PropertyContainer

stella.util.MirrorCenter

All Implemented Interfaces:

Cloneable, PropertySupplying

public class MirrorCenter
extends PropertyContainer

We take measurements of stars on the guider on the direct image and their reflected positions on the fiber mirror. Assuming that the difference in scales can be described by a single factor k and noting that

 dxm = -k·dxd,
 

we can write

 xm = -k·xd+(1+k)m,
 

where m is the projection center, i.e. they point where x_m = x_d. This class solves for both, the vector m and the scalar k using coordinate pairs of the direct and the reflected image.

Field Summary

Fields

Modifier and Type	Field and Description
private Multidimensional	center The function to minimize.
private static double	DEFK Starting value for k.
private static double	DEFXCENTER Starting value for mirror center x.
private static double	DEFYCENTER Starting value for mirror center y.
private List	direct List of points giving the direct star images.
static String	KEY_DIRECT The key to the direct pairs.
static String	KEY_K The key to the starting value of focal scale conversion faktor k.
static String	KEY_MIRROR The key to the mirror pairs.
static String	KEY_XCENTER The key to the starting mirroring center along x-axis.
static String	KEY_YCENTER The key to the starting mirroring center along x-axis.
private List	mirror List of points giving the mirrored star images.

Fields inherited from class util.PropertyContainer

KEY_LISTSEPARATOR, KEY_MAPKEYVALUECHAR, KEY_MAPSEPARATOR

Fields inherited from interface util.PropertySupplying

CONFIG, KEY_CLASS

Constructor Summary

Constructors

Constructor and Description
MirrorCenter(Map prop) Constructs a new mirror center, defaulting the starting values.

Method Summary

Modifier and Type	Method and Description
static void	main(String[] arg) Reads the properties from the command line, construct a new mirror center object and use an Amoeba to optimize the focal length ratio and the x/y mirror position.

Methods inherited from class util.PropertyContainer

augment, augment, augment, augment, augment, clone, defaultBoolean, defaultChar, defaultDouble, defaultFloat, defaultInt, defaultLong, defaultObject, defaultObject, defaultProperties, defaultProperty, getAsBoolean, getAsChar, getAsDouble, getAsEnums, getAsFloat, getAsInt, getAsList, getAsLong, getAsMap, getAsMap, getAsObject, getAsObject, getProperties, getProperty, has, initProperties, isNew, parseObject, parseObject, reload, reload, removeProperty, requires, rescanned, setObject, setProperties, setProperty, stringProperties, toString

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

KEY_K

public static final String KEY_K

The key to the starting value of focal scale conversion faktor k.

See Also:

Constant Field Values

KEY_XCENTER

public static final String KEY_XCENTER

The key to the starting mirroring center along x-axis.

See Also:

Constant Field Values

KEY_YCENTER

public static final String KEY_YCENTER

The key to the starting mirroring center along x-axis.

See Also:

Constant Field Values

KEY_DIRECT

public static final String KEY_DIRECT

The key to the direct pairs.

See Also:

Constant Field Values

KEY_MIRROR

public static final String KEY_MIRROR

The key to the mirror pairs.

See Also:

Constant Field Values

DEFK

private static final double DEFK

Starting value for k.

See Also:

Constant Field Values

DEFXCENTER

private static final double DEFXCENTER

Starting value for mirror center x.

See Also:

Constant Field Values

DEFYCENTER

private static final double DEFYCENTER

Starting value for mirror center y.

See Also:

Constant Field Values

direct

private List direct

List of points giving the direct star images.

mirror

private List mirror

List of points giving the mirrored star images.

center

private Multidimensional center

The function to minimize.

Constructor Detail

MirrorCenter

public MirrorCenter(Map prop)

Constructs a new mirror center, defaulting the starting values. Also reads the stars and defines my multidimensional for use with amoeba.

Method Detail

main

public static void main(String[] arg)

Reads the properties from the command line, construct a new mirror center object and use an Amoeba to optimize the focal length ratio and the x/y mirror position.